. >> reporter: a mystery professor, dan markelle, now a stunning turn or flip. >> we change the plea at this point in time. >> reporter: one of the two hit men charged is now cooperating with the prosecution. >> do you understand what you're doing? >> reporter: the man who clammed up for months has now opened up, talking with prosecutors in exchange for a vastly lighter sentence. prosecutors say rivera and his accomplice were hired for the alleged hit. it was july when mark jrnelle was shot in his garage. who would want the beloved professor dead in his beautiful ex-wife also a law professor told the police not everything had been amicable in their divorce. >> it caused me a lot of grief, but i would never do something like this. >> reporter: her boyfriend at family had come to hate markelle for blocking wendy and their kids from moving away. >> the family desperately wants her back in south florida. mother, father, and she has a brother. >> they hate danny in a way i've never seen this kind of obsession. >> reporter: was that enough for him to take a hit out on the professor. as pol

adelson, were you involved in a plot to kill dan markelle? did you discuss hiring a hitman. >> reporter: attorneys have said the accusation of their involvement are nothing more than fanciful fiction, and in response to the plea deal, charlie's attorney said the hitman would say anything to avoid the death penalty. but with rivera cooperating and another in custody, prosecutors want to turn that hope of future arrests into reality. for "nightline," i'm matt gutman in florida. >>> up next, a former cheer leader who suffered six concussions. warning young athletes and parents about what's become the most dangerous sport for young women in america. hey girlfriend, how's your cafe au lait? oh, it's actually... sfx: (short balloon squeal) sfx: (balloon squeals) i'm being so serious right now... i really want to know how your coffee is. it's... sfx: (balloon squeals) hahahaha, i had a 2nd balloon goodbye! oof, that milk in your coffee was messing with you, wasn't it? yeah. happens to more people than you think. try lactaid, it's real milk, without

dan markel. he was gunned down in his driveway in 2014 as part of a an elaborate murder for hire plot orchestrated by the wealthy family of his ex-wife. police say the 31-year-old alleged trigger man and windy a tulsans family. accused hitmen is the father of her two children. police say they discovered magnet was also the girlfriend of windy a tulsans brother, charles. >> i am a periodontist. >> reporter: dave turley it is an have anything to do with markel smarter? >> no. >> he is being looked at because of the fact he had a dating relationship with catherine. >> reporter: the motive officials believe the a tulsans were desperate for wendy and her children to move closer to them in south florida and dan markel was standing in the way. >> the working theory of the case is the reason for this homicide was due to the bitter divorce that was ongoing. >> reporter: an arrest affidavit suggest mac knew made deposits of about $50,000 after sh breast augmentation surgery three months after the murder. a

. >>> one of those that killed a florida state professor has pled guilty in the death of dan markel. investigators call it a murder for hire plot. police arrested markel's ex- wife and a woman linked to rivera is serving 12 years in prison for an unrelated crime. before the deal, he was facing the death sentence. >>> now to democracy 2016. the vice presidential debate. polite at the fact checking the statements of tim kaine and mike pence. they clashed over foreign pole. >> pence claims isis overran iraq because hillary clinton renegotiate -- [ overlapping speakers ] >> that is incorrect. >> politifact said negotiations failed between the u.s. and iraq to lead u.s. troops in the country but the key discussions were between the white house and iraqi leaders and the iraqis refused to sign an agreement that gave american troops immunity from prosecutio trump and his plan to build a wall and deport millions of people. >> donald trump spoke in phoenix he looked the audience in the eye and said we are building the wall and we are deporting everybody. he said, quote, they will all be gone.

a huge break in the deadly shooting of professor dan markel. >> he's got blood all over his head. >> chris: a newly released video confession. one of the alleged killers spilling every detail of ordered the hit. >> the distraught ex-wife whos battling for custody growth by police. now, well his ex and her successful brother go down for ordering a murder-for-hire? >> reporter: open the door, let's have a conversation. >> chris: then, is the most notorious murder case in the history of often. four teenage girls executed in a yogurt shop. >> he asked me, is that a body?

leading up to the killin >> reporter: the woman suspected of playing a key role in the killing of dan markel, taken into custody. kathryn was facing a first degree murder charge. police say markel was gunned down in 2014 in his driveway as part of an elaborate murder for mire plot, orchestrated by the wealthy family of his ex-wife, police say they discovered uea magbanuea was the boyfriend of whendi's brother, charles. did she have anything to do with his murder? >> no. >>> this morning, we have video of the moment a balloon show went wrong. this happened in the albuquerque balloon fiesta. into a power line. luckily, no one was hurt. >>> it was a close call over the week end for families gathered at a car show in houston. watch as this mustang shelby spins out of control and just misses people on the street. parents tried to scoop up their children. organizers reminded the people >>> it was pittsburgh steelers beating kansas and beating them bad, 43-10. >>> let's get the highlights from a few other games from our friends at espn. >>> good morning, america. i'm john buccigross. we begin with

dan markel was shot to death in the driveway of his home in tallahassee. >> the working theory of the divorce that was ongoing. >> reporter: his relatives have not been charged and deny any connection. >> even my family who thought i'd been mistreated would never do something like this. never. >> reporter: but police allege that katherine magbanua, arrested saturday, is the link between the adelson family and the alleged hitmen. investigators claiming in this affidavit that she had past romantic relationships with one of the accused hitmen, as well the family telling abc news magbanua was an employee. police also claim the accused hitmen's first call after the murder was to magbanua, her attorney telling us she has no prior convictions, and their priority is getting her out on bond. while tonight, police aren't saying whether there could still be more arrests. marci gonzalez, abc news, new batch of zika-carrying mosquitoes, the first captures in two weeks. >>> next, to an incredible weekend in college football. we start in the big house, wisconsin versus michigan. the badgers hoping f

s" first look, a woman suspected in playing a key role in the killing of law professor dan markell taken into custody. she is facing a first degree murder charge. markell was gunned down in his tallahassee driveway a murder for high orchestrated by his ex-wife. she is the link between the triggerman and wendy adel son's family. he was the girlfriend of charles. coming up at #-- 7:00 a.m., dan abrams weighs in live with the "g.m.a." first look, i'm matt gutman, abc news, los angeles. i love bread. i love ice cream. pizza! peanut butter. tacos! i love ramen. anything chocolate. chicken tacos, pork tacos. and now that i've learned to manage what i eat, i can still eat the foods i love. every. single. day. members have lost 15% more weight in the first two months on the beyond the scale program than on our previous program and they're still eating the foods they love. that's the genius of this program! join for free and lose 10lbs on us. hurry, offer ends october 3rd. listerine® total care strengthens teeth, after brushing, helps prevent cavities and restores tooth enamel. it's an easy way t

markel's murder?" weinstein: "no." and coming up at 7am, dan abrams weighs in live - with your gma first look, i'm matt gutman, abc news, los angeles. > coming up in our next half hour... we are following a lot of breaking news-- and first.. over a police investigation near desert inn and rainbow. you can see officers surrounding this home. they do have guns drawn. our photographer in the chopper says he is hearing on police scanners that homes nearby are being evacuated.. we've got parker collins heading to the scene right now-- stay with us. chopper 13 bringing you fast cozy up this fall with dunkin's coffee and espresso flavors. sip salty and sweet with our new salted caramel macchiato or drink in the season with the classic taste of pumpkin. america runs on dunkin'. politics should never come before basic health care, but that's the choice joe heck keeps making. women like me rely on planned parenthood for checkups and cancer screenings, but congressman joe heck voted ten times to take away their funding. heck even threatened to shut down t

woman suspected of playing a key role in the killing of florida state university law professor dan markel taken into custody. katherine magbanua is facing a first-degree murder charge. police say markel was gunned down in 2014 in his driveway as part of an elaborate murder for mire plot, orchestrated by the wealthy family of his ex-wife, wendi adelson. police say the 31-year-old alleged triggerman and wendi adelson's family. and they say magbanua was the girlfriend of wendi's brother, charles. did she have anything to do with his murder? >> no. >>> this morning, we have video of the moment a balloon show went wrong. this happened in the albuquerque balloon fiesta. one balloon drifts away and goes into a power line. the accident spark a flames and 1200 customers lost power. but luckily, no one was hurt. >>> it was a close call over the weekend for families gathered at a car show in houston. watch as this mustang shelby spins out of control and just misses people on the street. panicked onlookers scrambled out of the way. parents tried to scoop up their children. organizers reminded the peo

murder, accused in connection to the killing of a prominent law professor at florida state univ dan markel was shot to death in 2014. the murder coming after his marriage to wendy adelson unraveled. >> the working theory of the case is that the reason for this homicide was due to the bitter divorce that was ongoing. >> reporter: investigators' relatives are connected. the relatives have not been charged and deny any connection. >> even my family who felt like i'd been mistreated would never do something like this. never. >> reporter: but police allege that katherine magbanua, arrested saturday, is the link between the adelson family and the alleged hitmen. investigators claiming in this affidavit that she had past romantic relationships with one of the accused hitmen, as well as adelson's brother, charlie. the family telling abc news magbanua was an employee. police also claim the accused murder was to magbanua, her attorney telling us she has no prior convictions, and their priority is getting her out on bond. while tonight, police aren't saying whether there could still be more arrests.

prosecutors say his childhood friend fired the shots that killed the professor, dan markel in 2014. former in-laws hired the hit men following a bitter divorce. >>> and check out this frightening video. this is from a business outside tulsa, oklahoma. the man in the white t-shirt there rushes in with a knife and starts attacking the employees. he had been there earlier and was threatening to come back and kill them. one employee is knocked to the floor. others join in to try to get away from the man. they manage to get him outside and call police. >>> actor ben stiller is promoting early detection after revealing that he stiller who is 50 told howard stern that he was diagnosed two years ago, and he talks about how scared he was when he found out. but stiller says he is now cancer-free and credits a psa test with catching it in time. stiller is trying to spread the word about that test but it is shunned by many doctors as unreliable. >>> four fishermen discovered their cooler wasn't just a drink saver, it was a life saver as well. here they are floating in the get this, about eight

woman suspected of playing a key role in the killing of florida state university law professor dan markel taken into custody. catherine is facing a first degree murder charge. police say markel was gunned down in his tallahassee driveway in 2014 as part of an elaborate murder for hire plot orchestrated by the wealthy family of his ex-wife. wendy aidle son. the 31-year-old is the link between the alleged trigger man and wendy's family. police say they discovered she was also the girlfriend of wendy aidle son's brother charles. >> did charlie have anything to do with markel's murder? >> no. >> coming up at 7:00 a.m., dan abrams weighs in live with your migraines aren't just bad headaches. they steal moments from my life. that's why i use excedrin. it starts to relieve migraine pain in just 30 minutes. and it works on sensitivity to light, sound, even nausea, all of it. it works fast, and lasts for hours. excedrin specializes in treating migraines. which is why moments lost to migraines are moments gained with excedrin. come on duck! (puppy barks) you can do it duck. hurry up duck! you can d

dan markel- was shot to death in the garage of his tallahassee home in 2014? the murder coming after his marriage to wendi adelson had unraveled. georgia cappleman: the working theory of the case is that the due to the bitter divorce that was ongoing. the police's leading theory...adelson's family had become upset over the divorce?and hired two hitmen. those accused hitmen pleading not guilty? adelson's relatives have not been charged?and deny any connection. wendi adelson: even my family who thought i'd been mistreated would never do something like this. never. but police allege that katherine magbanua- arrested the adelson family, and the alleged hitmen? (gfx) investigators claiming in this affidavit that she had past romantic relationships with one of the accused hitmen - as well as adelson's brother, charlie? police also claim the accused hitmen's first call after the murder was to magbanua. her attorney telling us she has no prior convictions, and their priority is getting her out on bond. while tonight - police aren't saying whether there could still be

a huge break in the deadly shooting of professor dan markel. >> he's got blood all over his head. >> chris: a newly released video confession. one of the alleged killers spilling every detail of the crime, including food he says ordered the hit. >> battling for custody growth by police. now, well his ex and her successful brother go down for ordering a murder-for-hire? >> reporter: open the door, let's have a conversation. >> chris: then, is the most notorious murder case in the history of often. four teenage girls executed in a yogurt shop. >> he asked me, is that a body? i had to step back. it was.

a murder of a florida state university law professor dan markel, shot and killed in the driveway of hisin tallahassee in summer of 2014. more than two years later prosecutors cut a deal with a known gang leader, louis riff veer a he confessed to supplying the gun, driving the car and codefendant in the case pulled the trigger pointing authorities to a third suspect. in exchange for his information he will serve seven years in prison on top of a 12-years federal sentence served in unrelated case. wendy patrick, prosecutor and brian claypool, is a criminal defense attorney. wendy, why would prosecutors offer this guy a deal? he was facing several counts of second-degree murder? now he will do an extra seven years. why? >> that's right. it's a great question that unfortunately we have to face especially in cases where you've got something like a murder-for-hire. in other words, there is much that went on behind the scenes that we no way of knowing about unless we gather some kind of cooperation. prosecutor in this particular case said it very well. she called it a necessary evil. you're de

dan markel was shot to death in his tallahassee home in 2014.ter the marriage to wendi adelson unraveled. >> the working theory of the case is the reason for this homicide was due to the bitter divorce that was ongoing. >> reporter: investigators' leading theory? adelson's family tired of the divorce and hired two hit men. adelson's relatives have not been charged and deny any connection. >> even my family who felt like i had been mistreated would never do something like this, never. >> reporter: the police allege that katherine magbanua, arrested saturday, is the link between the adleson family and the alleged hit man. investigators claiming in this affidavit she had past relationships with an accused hit man and adelson's brother, charlie. police also claimed the accused hit man's first call after the murder was to her. the attorney telling us she has no prior convictions and their priority is getting her out on bond while police are not saying whether there could be more arrests. marci gonzalez, abc news, new york. >>> a little wisconsin boy

is facing a first degree murder charge for the slaying of professor dan markel. police say markel was gunned down in 2014 as part of an elaborate murder for hire plot orchestrated by the wealthy family of his ex-wife, wendied ale -- wendi adelson. sigfredo garcia magban magbanua's two children. and police say magbanua was the girlfriend of charlie adelson. did he have anything to do with the murder? >> no. he's been looked at because he had a dating relationship with katherine. >> reporter: the motive? the adelsons were desperate for >> the reason for this homicide was due to the bitter divorce that was ongoing. >> reporter: an arrest affidavit claims magbanua made cash deposits totalling about $50,000 in the months after markel was killed. she was also compensated with breast augmentation surgery three months after the murder. and an informant told them charles a the tab. the attorney for magbanua says they want her on bond so she can take care of her two children. in this elaborate sting, that undercover agent is trying to draw out the adelson's by posing as th

morning, katherine magbanua is facing a first-degree murder charge for the slaying of professor dan markel. police say markel was gunned down in 2014 as part of an orchestrated by the wealthy family of his ex-wife, wendi adelson. police say the 31-year-old magbanua is the link between the triggerman and wendi adelson's family. sigfredo garcia is the father of magbanua's two children. and police say magbanua was the girlfriend of wendi adelson's brother, charles. did he have anything to do with the murder? >> no. he's been looked at because he had a dating relationship with katherine. >> reporter: the motive? for the alleged hit? the adelsons believe they were desperate for wendi and her two children to move closer to them in florida, and he was standing in the way. that was ongoing. >> reporter: an arrest affidavit claims magbanua made cash deposits totalling about $50,000 in the months after markel was killed. police say she was also compensated with breast augmentation just three months after the murder, and that an informant told them charles adelson picked up half the tab. the attorney

and police say that the miami beauty linked dan markel's in-laws with a pair of hitmen from miami. the reason they wanted the famous law professor dead, an ugly "war of the roses" type of divorce. this morning, katherine magbanua is facing a first-degree murder police say markel was gunned down in his tallahassee driveway in 2014 as part of an elaborate murder for hire plot orchestrated by the wealthy family of his ex-wife, wendi adelson. police say the 31-year-old magbanua is the link between the alleged triggerman and wendi adelson's family. accused hitman, sigfredo garcia is the father of magbanua's two children. and police say magbanua was th girlfriend of wendi adelson's brother, charles. >> i am a per iodontist. >> did he have anything to do with the murder? >> no. he's been looked at because he had a dating relationship with katherine. >> reporter: the motive? for the alleged hit? the adelsons believe they were desperate for wendi and her two in the way. >> the work, theory in the case is that the reason for this homicide was due to the bitter divorce that was ongoing. >> re