damn p.i.? you're not sure this man's telling the truth, you think he's on drugs, aren't you going to find out that first? and if it hadn't been for that sergeant, dewey, i wouldn't have known a damn thing. because he's the one that called and told me, you know what i think, the son of a bitch is telling the truth. >> i got a call from her mother. said she had got a call from the police that they had found william, found him in his truck out there, and that he had -- he had confessed murr. >> what we learned is what they heard on the night that tammy died. the boys were obviously traumatized by what they had seen and heard. ♪ it's here, but it's going by fast. the opportunity of the year is back: the mercedes-benz summer event. get to your dealer today for incredible once-a-season offers, and start firing up those grilles. lease the c300 for $379 a month at your local mercedes-benz dealer. mercedes-benz. the best or nothing. a universal expression of disgust, (vo) stank face. often caused by ina

i'm a p.i., did you murder these women? let's sit down and have a cup of coffee. that wasn't going to happen. >> reporter: so what did happen? "20/20," oe sun-bleached ladies' man? or a lady killer? >> they all felt like it was homicide, that she had been killed. >> reporter: felix vail's first wife mysteriously drowned. two other women now missing for decades. but are there even more? >> the problem was is we didn't have a body. so without a body, you really don't have a crime. >> reporter: tonight, "20/20," in partnership with the clarion ledger/usa today river to investigate three cold cases, decades old. >> do i look like my mom, or am i me? >> i was looking for any evidence i could find. >> reporter: and they don't get any colder or stranger. >> the next thing i know, here comes this machete. just clank. then another machete clanks on the floor. oh, wow. >> reporter: from the summer of love to the summer of now. >> what happened >> reporter: all the pieces of the puzzle only now coming together. home movies. what was really hidden in a padlocked attic? a near

. >> narrator: on may 29, 1997, the p.i. spots danny pang holding hands with another woman.ext day, as janie pang prepares to meet with the investigator, a well-dressed man with a pencil-thin mustache and a briefcase rings the doorbell. he pulls a gun and pushes his way in. chasing janie pang through the house, he finally corners her inside a master-bedroom closet and fires a single round at point-blank range. [ gunshot ] it's the pang's fourth wedding anniversary. when "american greed" returns... murder is just one of many suspicious things that mark maremont uncovers about suspicious things that mark maremont uncovers about pang's past. everyone talks about what happens when you turn sixty-five. but, really, it's what you do before that counts. see, medicare doesn't cover everything. only about eighty percent of part b medical costs. the rest is on you. consider an aarp medicare supplement insurance plan insured by unitedhealthcare insurance company. like all standardized medicare supplement insurance plans, it could really save you in out-of-pocket medical costs. so, call

. >> we don't know what happened p.i don't know if he was just could have been me that pulled down thereed in. >>reporter: this case could be connected to three others over the past three years. new video from san jose police show as different deadly shooting that happened in8g marh at the cafe on actualyr;áy 43-year-old brian lee inside when shot. his killer also haven't been 41-year-old man]] was gunned dn in5? december of 2014 outside t golden king cafeçu on al1-jti avenue. you canç; see this video inih sw motion justiç moment before th< suspect pulled the trigger. ÷u':deç back to april 2013u. 37-year-old:4 tran was shot tov[ death on center÷ road outside audio business that d3-@led as police say all 4 victims were to frequent the asian cafe whi over the years have been cited forq violent illegal gambling or prostitution. cafe also connected to vietnamese street gang. >> whether or not the particular case6ps were a gang activity that was planned we don't know but we are definitely looking at that as a possibility. that could help investigaéjuáe-l police.÷-q (r)is winn abc 7 new.

a little bit of deflationary pressures in terms of the gate prices coming through for that perform p.i. numbers -- p.p.i. numbers that were released. that's the biggest jump that we've seen in around three months. so every stock in the black apart from one on niike. and helping out korea by 1.2%. australia's market getting a boost. so quite a lot of buying coming through in a lot of those material players. you can see that coming through across southeast asia as well. i want to show you some of these emergencying market economies. e here up by 1.4% holding up $1,145. and the fact that we've seen weakness in the yen holding that rise that we had over the past four sessions also giving strong sent development a lot of those export stocks. so a lot of great start to the training week. >> you mentioned crude prices. we have seen a decline. >> yes, we have. and that is as we start to see a lot more drilling resume in the u.s. we did have a numbers of rigs stopping production earlier in the year. but we are seeing that a number of active rigs is at its highest. so that is putting some downwa

. >> i knew i couldn't walk up to felix and say, hey, i'm a p.i., did you murder these women? of coffee. that wasn't going to happen. i'm going to tell him i am hired by an insurance company to investigate this fire, and that's going to get me in his door. i knocked on his door and he looked a little put off at first, and then i told him why i was there and then he was perfectly fine to come out and walk around with me. >> reporter: in her ruse of investigating the fire, she takes these photos. including a rare image of felix in his 70s. she says he's been living like a hermit. >> he said, well, i'm going to come in, come inside and i was like, okay. and of course i'm immediately, where can i get out. and there was no place to get out. there was this big plastic rubbermaid tote and of top of -- it's a little toolbox and there's a hacksaw and a hammer right on top of it and that's all that was going through my mind was, holy crap. >> reporter: 20 minutes later, gina excuses herself and is out the door. but she's laid the groundwork. and one week later, she's back. heart beating

and the p.i. clearly describe the clothing as all black, possibly mask, camouflage. getting that either from witnesses or the shooter that is deceased was wearing clothing similar to that. and they believe the other actors may have had it as well. >> jim you mention the pio, the public information officer for the baton rouge police and baton rouge officer lj mckneely did make that public statement. i want to read it so we quote the police precisely with regard to the profile of a potential suspect as you mentioned. impb mckneely saying if anyone is wearing army fairway teaktig. all black. anything, please give us a call. that is a profile after person they might still be looking for and i want to repeat we don't know whether there are multiple suspects or not. we only know the police as an investigative matter are conducting that kind of search. take a listen to this. [ distant shots ] >> you hear there jim cavanaugh. you hear the shots fired that were captured on a camera we live in a world where we get slices of video of things. and you and i both know a slice of v

. >> when we entered the '80s, a lot of dramas that were lighthearted like "magnum p.i.".s.h." went off the air, the next season there wasn't a single sitcom in the top ten. first time that had ever happened in tv history. the prevailing feeling was that the sitcom was dead. >> brandon tartikoff, nbc programming chief, says reports of the sitcom's death were greatly exaggerated. >> time and time again, if you study television history, just when someone is counting a forum out, that's exactly the form of programming that leads to the next big hit. ♪ >> 1984 "the cosby show" comes on. bill cosby is not new to tv but "the cosby show" is different. it stands apart from everything else he's done. >> i wanted my eggs scrambled. >> coming up. >> they talked about parenting. before that, the kid were cool and the parents were idiots. "cosby" says the parents are in charge and that was something new. >> instead of acting disappointed because i'm not like you, maybe you can just accept who i am and love me anyway because i'm your son. >> that's the dumbest thing i've ever heard in