jarvis tyler is accused of shooting a pregnant stacy seton in exchange for cash and drugs. y spencer is live in upper marlboro where she talked exclusively with seton's mother. >> reporter: you probably remember her. gayle seton went on a personal crusade to never give up until her daughter's killers are found. it took several years. finally two arrests were made. one man is on trial starting today and prosecutors say it was a single cigarette butt that linked him to this killing. stacy seton, a 17-year-old bowie girl shot and killed in june of 2005 in a park behind her home. today prosecutors outlined a murder case against syracuse killer jarvis tyler. they say tyler was hired by this man mcdonald abraham known as duece to kill the teen. they say duece paid tyler $400 in cash and $200 worth of pot to kill stacy. prosecutors say duece believed stacy was involved in the theft of drugs, money, and a gun from his apartment. assistant state's attorney dorothy engel said duece was stacy's judge and jury and tyler was her executioner. she said that's what her life came down to, tw

mcdonald abraham, who has confessed to hiring a man to kill stacy seton in june 2005 took the stand to pin the murder on this plan, jarvis tyler, who's now on trial for allegedly being the trigger man. abraham's credibility immediately came into question by fiehler's attorneys who pointed abraham's testimony is a plea deal that could land him in prison for as few as 15 years. defense attorney william brennen pointed out that abraham bragged to a friend that he got a sweet deal after turning down offers from prosecutors four 30, 25 and 20 years in prison. the reality is, you cut a deal for 15 years in prison, correct? >> correct. abraham is changing his story. in interviews with police in 2005 and 2009, he said abraham lied and said he had nothing to do with stacy's murder. in 2005, you thought lies would set you free. abraham, yes, sir. he also took issue with brennan characterizing him as a murderer. i told somebody to do it, but i didn't pull the trigger, i'm not a murderer, i didn't kill her. abraham said he paid jarvis tyler $400 and two bags of weed for killing stacy. stacy set hi

stacy seton was killed in a park behind her home until buoy maryland in june of 2005. mcdonald abraham has pleaded not guilty in the case, today he testified for the prosecution, he said he paid jarvis tyler $600 in cash and marijuana to kill seton, tyler's defense attorney questions are cooperating so he can get a lighter sense tense. >> you don't know what goes through people's minds, the witness's minds, the juror's minds and it's difficult. >> abraham says he wanted seton killed because he mistakenly thought she set him up to be robbed. >>> coming up tonight, the i team will show you how you can check up on your favorite gas station to make sure you're getting all the gas you pay for. >>> do frequent flyers need to worry about an increased risk of radiation from those airport scanning machines? pete williams has the report. >>> so with a do you do with your gum when you're done? who you gonna call? you probably saw that coming, didn't you? >>> a local marine hit the jackpot, we'll tell you how he used one bill on one machine to win almost 3 million goods, and we'll

jarvis tyler faces first degree murder charges in the death of 17-year-old stacy seton. he's accused of shooting the pregnant teen in the head near her home in 2005. prosecutors say another man, mcdonnell abraham, paid tyler $400 and some marijuana to kill her because he thought she had set him up, breaking into his apartment. abraham pleaded guilty to second degree murder last year. tyler faces life in prison if he is convicted. >>> the trial of five men accused in the southeast mass shooting in 2010 was delayed today because of a sick juror. the trial resumes tomorrow morning. the men are accused of killing five people and injuring many others in an eight-day shooting spree. they were charged with 24 counts, including first degree premeditated murder. each of the men will face life in prison without parole for these shootings. >>> today is your first chance to weigh in on the proposed metro fare hike. officials say the hikes are necessary to cover improvements to the system. the proposed fares would have paper fare card users paying a flat fee of $6 during rush hour an

finally we're going to get justice for stacy. >> reporter: gayle seton is the mother of stacy, the 17-year-old bowie girl murdered in a park near their home in june of 2005. nearly seven years later one of her daughters' alleged killers is on trial. >> it's a long, stressful day, but i'm so grateful to be here almost seven years later. >> reporter: today prosecutors outlined a murder case against her killer, jarvis tyler. they say tyler was hired by this man macdonald abraham known as duece to kill the teen. they say duece paid tyler $400 in cash and $200 worth of pot to kill stacy. prosecutors say duece believed stacy was involved in the theft of drugs, money, and a gun from his apartment. assistant state's attorney dorothy engle said duece was stacy's judge and jury and tyler was her executioner. she said that's what her life came down to -- two bags of weed and $400. prosecutors say dna was found on a cigarette butt near the murder scene and nearly four years later it was matched to tyler. they say there were 21 calls placed between duece and tyler on the day of the murder. engle s