loren lorenzo, i want to thank you so much for being here and sharing your daughter's story with us. still ahead -- >> thank you for having me. >> still ahead, while isn'tific evidence has been used to exonerate some, it's been a central tool used to lock up others next, this former fbi agent joins us. he lost his job after blowing the whistle on faulty forensic. hear how he exposed thousands of cases whic mishandled evidence including 27 on death row. >> can be can take you away from whatever your family is having done something you never did, that you were never close toanding put you in a cage and a death chamber. it's not a joke. >> a bit later, we reveal one of the most controversial methods used by some in law enforcement during eyewitness interviews that could make or break a guilty verdict. back in two minutes. >> investigating a dark side of the law >> they don't have the money to puchace their freedom... >> for some...crime does pay... >> the bail bond industry has been good to me.... i'll make a chunk of change off the crime... fault lines... al jazeera america's hard hitt