. >> 15 years later donna velasquez relived that drama.arbara, remarried and living in arizona got a call from david's worried mother. ba barbara said she wasn't worried. not then. >> he was with one of his girlfriends and she was like no, we are doing a missing persons report. i said no. he is going to call me in a couple of days. i know he is. he never called. he never called. >> one day turned into the next. police, family, everybody tried to find him. couldn't. >> we started looking. searching. the pipes and little bridges on the dirt roads. anywhere. you see a car that looked like his, you did a u-turn and chased it. >> how long did that go on? >> until they found his car. >> which more than three months later turned out to be at the airport. did he just take off? his close friends didn't think so. >> if he got on a plane and wanted to do something different, no, he wouldn't do that. >> david had been preparing for the arrival of his 5-year-old son, john. this was a big one, a month long summer visit. >> he was preparing for this visi

. >> velasquez had her moment. 15 years, she made sure someone would be held accountable for the death of david jackson. >> it was the culmination of 16 months of a long, gruelling, up and down, tiresome investigation and nights of not sleeping and days of going to work and living off of coffee. i thought you know what, this is what it's all about. >> it was november of 2007 when michael wolfe went on trial for murder. after so many years, any physical evidence that might have tied him to the crime was long gone. what prosecutors did have was the verbal confession, that drunken story his ex-wife said he told her. then, check mate. another ex-wife told police virtually the same story. >> he said he shot him in the head. he told me that he had a silencer on the gun. >> she too was called to the stand. that was enough. the jury was out less than an hour. the verdict was guilty. after sentencing, in prison, david jackson's family confronted michael wolfe. not just to condemn, but to ask a question because there was a p

. >> the last time next door neighbor jose velasquez saw cobbold, she sat in the black mitsubishi for two hours. >> she was sitting in the car reading the bible. >> neighbors were stunned that the woman they saw on the news lived here. >> i had no idea she lived a couple of houses down. >> rarely we see here and i just say hello and that's about it. >> police say cobbold was taken to a hospital to be evaluated. her injuries were not serious. tonight, it's a mystery why she allegedly did this. >> do you have anything you want to say? >> contact the police department. >> montgomery county police say cobbold is looking at potentially a number of charges. as of tonight they have not decided exactly which charges she will be facing. >> tom, thank you. we are following breaking news from central america where the u.s. geological survey said a 6.6 magnitude earthquake hit costa rica outside the town of liberia. there are no reports of immediate damage. the men running for president are back on the campaign trail just 14 days before election day. both campaigns traveled back to key battlegrou