you know who that is, right? lapd officer, john everett. same cop that killed your little brother 17 years ago. and disappeared two weeks later. i have nothing to do with this. several witnesses say you threatened officer everett's life. i was young. i was a hothead. said some things i didn't mean. don: hey, his car was found a couple hundred feet from your house. calvin, man, you've spent more time in a law library than we have. you know that car gives you opportunity and your brother's death, that gives you motive. my little brother was shot down like a dog. police didn't investigate. you guys didn't care. don: your little brother was a drug dealer who ran with one of the most violent gangs in the city. you make it sound like stephon had a choice. like any of us did. got one choice out there, man: live or die. is that what you told officer everett when you put a bullet through his skull? i've already been to prison for crimes i committed. i'm not going back for one i didn't do. life without parole. okay? that's the only time you're going to hear that offer.

you people think my brother got what he deserved. well... i think same might be said for this cop. what was that you said? don: all right. say that again. listen, gary, come on. hey, gary. gary, gary! hey gary! all right, all right. listen. down. could i talk to you for a second? yeah, yeah, yeah, yep. you can't do that around here, you know? you gotta calm down. whew. okay. he wants to desecrate the memory of one of my men. you just let me have a piece of him, i'll get a confession. no, i can't do that. come on, eppes, just take a walk, go have dinner or whatever. i understand how you feel. it's not gonna happen, all right? okay, listen. before everett disappeared, he was worried about retribution. he'd heard things on the street. and we're running that down. yeah, well, i've been running it down for 17 years. and now, you have the man. you have him sitting right here. the man who killed him. now, if you two don't have the stomach for it-- don: that's not the case. calm down. all right? we tried.

we don't have enough to hold the guy. period. are you setting him free? yeah, you bet i'm setting him loose. excuse me. (groans) someone's not happy. bradley called our bluff. well, it's about to get more interesting. the ballistics are in. the bullet that killed everett came from a .38. what? a revolver? or a revolver that was issued to everett. it's his duty weapon. same gun that killed stephon bradley. that would mean everett was killed with his own gun. the best in nutrition... just got better. now with even more of the vitamins your body needs. like vitamin d. plus omega 3's. [ female announcer ] eggland's best. the better egg.

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kevin wouldn't even remember his dad if it weren't for those guys. they took him to ball games, camping trips... how's he holding up? it's been tough... watching me get through this. but he's lucky. he's got four great surrogate dads. when lieutenant walker said that your husband had some concerns after shooting stephon bradley. uh, that's his way of saying he was upset. case you haven't noticed, lieutenant walker doesn't exactly express himself well. emotionally, i mean. truth is, the shooting changed my husband. he wasn't prepared for the way he felt after killing that kid.

was he depressed? depressed? did he have trouble eating? or sleeping? what are you asking me? well, our forensics indicate that your husband was killed with his own gun. you think he killed himself? no... no, he wouldn't do that. well, i'm sorry to put you through this. we just, uh... we just wanted to be sure. walker's got bradley tried and convicted. yeah, i know, i know. want some coffee? no, i'm good. what's going on? is everything okay? yeah, yeah, it's just some stuff. you know, i really don't want to talk about. talking's not exactly what i had in mind. uh, isn't this sexual harassment?

uh, i'll show you sexual harassment. all right. hey. i want your input on that, eppes. yeah. roger that. amita: that's amazing. and in 1977, there were fewer than... 500 murders in los angeles. and by 1985, the number doubled. well, there must be some sort of causal explanation for those statistics. yeah, i mean, it was the introduction of mass drug sales by the gangs, you know? fights over street corners-- territories shifting led to more killings. what? you quit. what are you talking about? chair of the curriculum committee. you know how huge that is. i can't believe she told you. you know, neither larry nor i were ever asked to chair that committee.

there's some pretty heavy hitters, you know. it can be intimidating. i mean, maybe not for you... well, i've seen you with the faculty, you're very good. some of the professors talk. about us. what?! well, it doesn't matter. no, just tell me... what, so that you can protect me? look, you can't and you shouldn't have to. i'm just not ready for this. agent reeves, did you mention something about suicide? did you mention to everett's wife that he killed himself? no, i never said that. i know you didn't say that. but did you say something about, "well, was he depressed...?" eh, he was depressed, lieutenant. now, you shouldn't... you really had no right to do that. hold on. don't come in here telling us what rights we do or don't have, gary. now, i understand how you feel... no, i don't think you do understand, eppes. i don't think understand how i feel. i don't think you know what it's like to living it in the streets, the way we do.

and back then, it was a war. cops were dying every day, trying to take back this city. and everett was one of them. did you know everett was killed with his own gun? what? yeah, ballistics matched the bullet to the .38 that killed bradley, all right? take a look. i don't need to see that. what are you talking about? that means that bradley got a hold of everett's gun and he shot him with it. so what? the body was buried, remember? how did that happen? i said before, the construction crew could have buried his body and not ever knew about it. what are you doing? are you writing calvin bradley's closing argument now? i knew everett. he wouldn't have killed himself. i got something. charlie: the gang case i worked on last year, my guiding principle was their territorial nature. and it turned out some of these gang members spent their whole lives living within a 10-block radius. their turf. right, i remember. they live a mile from the ocean; some of them have never even seen it... right, so here is a map of all known gang territories back in 1990 and using the theory of collective behavior, i...

lieutenant walker, imagine a colony of ants searching for food. they send out a scout and that scout wanders around randomly. if that scout finds food, well, then the colony marks that path as good. if he doesn't find food, then that path is marked as neutral. and if that scout never returns, you better believe that path is marked as bad. same thing works with gangs. calvin bradley was a member of the bixel street family. this was their territory back in 1990. everett's body was found here in an area controlled by a gang called the 18 street mexicali. 18 street mexicali and bixel steet family were rivals. factoring in for territorial gang shifts... i cannot find a single safe passage. don: for bradley to travel from his turf to a rival's turf to even have killed everett. charlie: it would be like a sunni going for a ride in a shi'ite neighborhood. calvin bradley probably wasn't our killer.

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megan: so calvin bradley would've had trouble getting to the crime scene. which doesn't make him innocent... yeah, charlie's math is all about probabilities. so, if he says it's unlikely, it probably is... megan: which takes us back to what? suicide? well, what if we just keep following the probabilities. meaning what? well, if the math says it's doubtful anyone from a rival gang would have access to the 18 street mexicali territories, that narrows our suspect list down. to someone in the 18 street mexicali crew. right. i'll talk to charlie about running some names. hey! what's going on? whoa! oh, hi. hi, the door was open. i hope you don't mind. oh, no, no. not at all. come in. good. thanks. wow. what's going on? i love what you've done with the room, huh. you do? very, uh, early american interrogation room, it's nice.

i can see your pores. you notice, eh? so, so what? charlie told me about this whole lawsuit thing. yeah. i just wanted to come give you some moral support. well, uh, thank you, i appreciate that, but what i really need are answers. yeah, to what? i've been going over my original calculations. they're absolutely right. i just don't understand what the problem is with the lighting. i tried to simulate it here. angles of incidence, good. you got reflection, absorption, saturation coefficients. very impressive, very impressive, mr. eppes. now i see where charlie gets his interest in numbers. yeah, well, i'm afraid there's only one genius in this family. oh, i don't know. hey, i know, i know charlie's busy helping out don, and if you're interested i'm available. to go over your figures. my figures? yes. i got it. put your head down. (laughing) don: what do you say, lieutenant? it's happy hour somewhere, right? let me get a club soda. club soda. you know that i've been trying

to pin this on calvin bradley for 17 years. it's a little hard for me to believe that after all this time i might have been looking at the wrong guy. hey, look, it's not over yet. thanks. well, you'd think that i would know after all this time that things are never what they seem. you followed your gut. there's nothing else you can do. it's a whole different world out there now, eppes. it's a whole different way of policing, a whole new way. down is up, up is down. everett wouldn't have killed himself. that's not the man i knew. so, tell me about 18 street guy? well, they're not around anymore, that's one thing. and they used to be one of the biggest drug suppliers on the west coast. all right. so, if everett was shot in their territory, then somebody knows something. i mean, come on, somebody had to have seen something, right? yeah. hey. how you doing?

tell me where jimmy lopez is? the other side of this cab. jimmy lopez? fbi. i'd like to talk to you for a minute. fbi? yeah. get your hands up. how you doing, jimmy? officer walker. you got a good memory. what's, uh... what's going on here, guys? walker: we thought we would take a trip down memory lane. yeah, maybe you didn't hear, but... i don't snitch no more. is that right? well, they found officer everett's body. who? officer john everett. nah, that name don't ring a bell. well, he was found buried in 18 street mexicali territory, so his name better start ringing some bells or i'm gonna ring your bell. i never had nothing to do with killing no cop. there's no way he gets shot in your territory and it's not the news of the decade. no statute of limitations on murder, jimmy. you know that, right? i heard what everyone else heard, okay?

what's that? the cop was whacked courtesy of the bsf. payback for some shooting. so, what's he doing in the 18 street's territory? no offense, but when it came to killing cops, gang bangers can find some pretty common ground. (door shuts) oh, hey. there you are. i went by your office looking for you. you did? yeah, i just wanted to talk. about what? mm... you know, i thought about walking away myself once. you did. was first time i orally defended a dissertation. charlie eppes, not confident about math? i was more scared of quitting than i was of going through with it, so... i couldn't walk away. i'm gonna do it. i'm gonna chair that committee. you are? i may make some mistakes... no, you're gonna be great. you're gonna be great. i'll help you.

you know, if you want my help. i'm not saying that you need my help. if you want it. i will take all the help i can get. see that? we're a lot alike. 'cause i'm always asking you for help. yes. speaking of help... i see you're still after that cop killer. yeah. liz warner says that he might be a member of a street gang called 18 street mexicali. but none of the shooting chains are tracking back to a common shooter. that's right. what are you thinking? you used collective behavior theory to define the path the killer could have taken. but that's not the whole the story. you're missing a variable. the victim. i need to know the path that everett was taking as well. don: all right, so according to this 18 street had two triggers at the time of everett's death. walker: it could still be anyone in the gang. i hoping your brother's got an answer. all right, charlie, hey, tell me you got a name for us. no, no. something else. charlie looked at the timeline of events

for everett on the day he was killed. and i applied critical path analysis, which is a mathematical way of looking at the most efficient manner to complete tasks. imagine you're cooking a holiday dinner, and you cook it all at the same time. well, some of your food's gonna end up burnt. some of your food's gonna end up cold. what you need to do, is prepare and cook each part of the meal in an effective order and monitor them simultaneously so that you serve all hot food at all the same time. the same concept applies for everett. and he changed two appointments he made that day. don: all right, i mean, so why's this significant? because people tend to schedule meetings as close to one another as they can. schedule them in a progressive order, if they can. kind of like a... math of convenience. but his body and his car were found a few miles apart. meaning that either everett was killed where he was found and his car was moved afterwards or... or else he drove to the bixel street turf and was transported to where we found him some other way. thus making one of those two pieces of data skewed.

so... i ran two different analyses. i gave probability scores to the areas that everett was most likely headed to. now, this first map, assumes that he was headed to where his body was found, to the 18 street mexicali territory, making this his most likely next destination. all right, and if he drove to the bixel turf? then everett was most likely headed here, by a more efficient path. do you see something? well, back in 1990, internal affairs had their headquarters right here. internal affairs? why would he be headed there?

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nourishment with zero weight. everett was on his way to internal affairs and he was killed before he got there. yeah, that ain't a coincidence-- no way. david: okay, so why was he on his way to ia? well, everett shot stephon bradley. right? david: yeah. but a shooting board ruled it as a good kill. yeah, they did, only ia was taking another look. yeah, why's that? well, three days before everett shot him, stephon bradley was picked up by homicide. he was wanted for a series of murders. he was taking down rival gangs' stash houses and killing everyone inside. and he offered to trade information against dirty cops. was he dirty, gary? no. i don't believe that. what were the circumstances of the killing? we got a tip that bradley had committed a double murder.

we found him at his girlfriend's house. everett covered the back, bradley tried to bolt for it. everett shot him. starting to smell like a bad kill. liz: all right, so... everett was headed to internal affairs to confess, and he stopped in the bsf territory on the way. why? well, a cop with a guilty conscience might wanna come clean to the, uh... the brother of the guy that he killed before he went to ia. you saying that everett went to see calvin bradley? walked into the arms of the one man who wanted to see him dead. (tires screeching) calvin. how many times we gonna go through this, fellas? you're wasting our time. we know you saw everett the day he disappeared. okay, you wanna prove you're a changed man, calvin? how 'bout owning up to what you did, finally, huh? i did ten years taking responsibility, lieutenant. what about you? i hadn't committed any crimes.

no, you had other people do it for you. wait, hold on, say what? don: what's that? you really want to know? yeah, i really wanna know. all right, everett did come to see me that day. to apologize. all right, he wanted me to understand what had gone down with stephon. only he left my house alive. you're a liar. and you don't know any better. all right, careful, hey. don: what did everett say to you? 16 years i been the suspect and you want my help. the cops were giving stephon tips on the location of mexican dope houses. what? stephon ripped them off while the cops looked the other way. then they killed him when he wanted to tell the truth. whatever my brother was... you were the ones that made him that way. can i go now? what do you think, gary? yeah, get out of here. get out of here. yeah, well, you can ask but i'm not giving you a deposition. no, not until i know more facts. (knocking on door) yeah, come in.

all right, if that's your position you can talk to my lawyer. you got it. you know a good lawyer? i do. i know several. good. alan. geez... come here. huh? come here. come. relax. here. sit. no, it's all right, breathe. (sighs) relax. all right, it's gonna be fine. all right, we are gonna tackle each problem, one at a time. albert einstein said that? no, i read it on the back of an iced tea bottle. oh. it still applies. you know what i did? i simulated your design on the cad program at calsci. well, i thought things like this were, uh, frowned upon by certain administrators. yeah, so i'm busted. but who's gonna tell on me? me? (chuckles) well, if that million-dollar computer of yours is, uh, correct... there's no way that that driving range can be as bright as the plaintiffs claim it is. i know, but the measure of foot-candles is just off the charts. so, i, it, it...

it doesn't... oh, wait, wait, wait, wait, wait. i know what this means. millie: the hue of the polypropylene is wrong. they didn't use the synthetic grass that i specified. the contractor uses a cheaper material which reflects... which reflects more light! see?! well, i'm off the hook. yeah. except for you electric bill's gonna go through the roof. oh, that's all right. charlie owns the place now. (both laugh) so the police were using stephon bradley to take down mexican drug gangs? no way everett was a part of that. then why did everett go see bradley's brother to apologize? easy. just saying, how long we gonna live in denial here? megan: okay, well, let's look at what bradley's saying. if what he's saying is true, then someone had to be telling the cops where the locations for these houses were to begin with, right? well, if we find that source... maybe he can point us in the direction of everett's killer. okay, so let's take a look. these are the gang territories where calvin bradley's brother ripped off those drug houses, and they're spread all through mexican gang territory, except for one.

david: 18 street mexicali. which is the same territory where everett's body was found. okay, so why'd these guys get a free ride? what it means is that whoever was feeding them information was 18 street mexicali. and he didn't want to snitch on his... on his own gang. jimmy lopez. (tires screeching) where's jimmy lopez? man: i wish you could tell me. took off. haven't seen him. where's his rig? around the corner. that's it.

♪ walker: jimmy lopez. been keeping a secret from me for 17 years. (phone keypad beeps)

just doesn't add up. lopez was clean for years. you think the pressure of being questioned by you guys pushed him over the edge? or someone else did. the tip of the needle is broken off in his arm. really? don: like he fought back? david: toxicology report shows a mixture of heroin, strychnine and powdered milk. nice little cocktail. what are you thinking? most drug dealers, they're very consistent in the way they cut their drugs. walker: that's true-- signature, brand-- helps them sell it on the street. maybe we get a tox report from lopez's od over to charlie. megan: he can compare the drugs in lopez's system to the other ods in the coroner's database? sure, go for it. it's worth a shot, right? statistical identification? right. just looking at toxicology records of recent ods. i'm trying to match a specific drug combo to a dealer.

strychnine-- that's poison. it's a trace dose. it's not enough to kill. you know, dealers put it in their heroin mixes. poison plus heroin. yeah. a witness who identified our cop killer od'd, so i'm just trying to trace the drug supply. what's happening with the committee? (sighs) some of the faculty are demanding, but... i think i'm up for the job. i never doubted it. what are you working on? uh, millie has me working on some cluster analysis using autocorrelation techniques to analyze the most effective undergrad classes in the past two years. even going through the past two semesters would be a ton of work. yeah. millie thinks there's as much to be learned from the old curriculum as the current. what is it? you know what? can we talk later? i got to go. okay. we got lapd looking up all his known associates. charlie: hey. so i ran the drugs in jimmy lopez's system

against all the recent ods in the coroner's office, right? don: yeah, and? there were no matches to any current dealers, which is why i re-ran every overdose in the coroner's database, including old overdoses, and i got a hit-- several hits, actually. three overdoses going back over a year, all tracing back to a drug dealer named hector osorio. (typing) megan: uh, osorio was busted by lieutenant davidson's narco team. a large quantity of drugs were seized. which would be in the evidence room. and who would have access to those drugs? the lead detective of the team. my guy davidson. davidson: hey, walker, what's up? you guys got any news? what the hell's wrong with you? don: all right, all right! you're under arrest for the murder of john everett. what are you talking about? they traced the drugs in lopez's system to a bust

that your team made, huh? so what? yeah, that means that you poisoned lopez with those drugs. tell me the truth. you got nothing. you don't got jack on me. (shouting) how could you do that?! all right, get off! you ate at everett's table! hey! you helped raise his son! gary, cut it out! back off! this isn't helping! turn around! get your hands behind your back! we never took a dime. i made the streets safer. every drug dealer that bradley whacked... i don't believe you! no! not one drug dealer bradley whacked ever killed another kid with junk! you got that?! i made the streets safer! so when everett was about to rat you out, you killed him. because he had it coming! you set him up all right, all right. to take the shot. let me just see him for one second. he was gonna go to ia! let me just... give me that. get this piece of crap away from me. he wouldn't listen to reason! hey, walker! walker, i had no choice! (door closes) hey, dad. hey, charlie. what? no plans with amita tonight? she's busy chairing a new committee.

i guess... millie found the magic bullet, huh? yeah, they dropped me from the lawsuit. contractor's on the hot seat now. oh, good. well, i'm glad she could help. you know, if you would've needed my help, i certainly would've been there for you. oh, yeah, i know, i know. oh, by the way, charlie, when i hooked up all these lights, i may have blown a circuit or two. a circuit or two? where? yeah. i hope you had the system backed up with that laptop of yours in the garage. ah-ah-ah! (chuckles) i was just kidding. (soft jazz playing) hey. so... what's going on? i'm worried about you. ah, i'm all right. i mean, you know, did i do something to... no, no, no. liz, it's not about you. i mean... okay. you can't just get me going and disappear.

yeah, i know. i just... i feel like i keep second-guessing so many moves. mid-life crisis, huh? ha, ha. anyone see you come in here? listen to you. ♪ hey. hey. i got plenty in the bottle here. i can see that.

300 bucks. thought he'd appreciate it. gary, there was nothing you could have done. i mean, look, i know that and you know that. we'd both be lying to ourselves if we said that, eppes. 17 years. it was right there under my nose. i just couldn't see it. he was a funny kid. he always walked around with this goofy grin. i remember he had this little red radio that he used to play, and there was one song that he really liked to listen to, and i... i just haven't been able to remember that song. i wish i could remember that song. wasn't it you that said, "at the end of the day, you go home safe, that's all you can ask"? that's right, eppes. you... you walk away... it all works out. ♪

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excuse us. shhh-shh! [father: brian pike] at first, you think, i want my son to be able to walk. [female narrator] army specialist andrew pike was paralyzed while serving in iraq. [andrew pike] my injury was a gunshot wound to the left abdomen from a sniper. my first contact with the paralyzed veterans was in walter reed. [national service officer michael killen] we try to reassure him what benefits are out there, and we try to educate him and take some of that stress away from him. p-v-a did a fantastic job making sure that he got those benefits in a timely basis. [michael killen] we helped him apply for automobile grants, special adaptive housing and vocational rehabilitation [andrew pike] right now, i'm going back to school to earn a degree. i'm working with a real estate agency in town with my realtor's license. and i'm just spending time with my wife and child, and just moving on with our lives. just as anyone in my age group would do. [female narrator] paralyzed veterans of america