the dna evidence says sonnier did not commit the crime.the sixth prisoner free a victim of shoddy work by the houston crime lab. >> the houston crime lab is everything that has gone wrong. >> barry scheck is the co-director of the innocence project working to exonerate wrongly convicted people. the group took on sonnier's case. >> there were numerous balances where analysts misreported their results or hid exculpatory results. >> reporter: add to that a leaky roof and tropical storm that flooded the lab in 2002 and they earn the label junk science. >> the past problems are uncon shen shl. >> reporter: the local district attorney wants a county lab to take over duties of the troubled city police lab. >> it is vital we have an independent crime lab. >> reporter: the victim in this case was kidnapped at this gas station. the victim identified sonnier. the hair was supposed to have been found in the car. junk science not only wrecks the life of someone like ernest sonnier but harms us the public. the person or persons who kidnapped the victim

earnest sonnier is free after serving 23 years behind bars. a judge ordered him released in part because tests showed that blood stains on the alleged victim's plants could not have come from sonnier. >> i always told, you know, people that not have come from him. >> i told people who knew me in prison that i was innocent. when you in prison you tell the same story. everybody -- everybody say that. i used to be mad, you know, but like -- you know, the past is the past. >> he's the sixth convicted man released after results from the houston police department crime lab were challenged. the district attorney is reviewing 160 cases because of allegations and inaccurate test results from the lab. >>> a camping trip for a mother and son turned deadly for the 11-year-old boy. he and his mom ventured into death valley a week ago on what was supposed to be an overnight trip. they along with their dog was found. they were buried up to the car's axels in the sand. she fixed a flat tire and continued into death valley depending on gps directions. death va