there was no direct evidence tying isaiah hagan to her daughter's murder. a killer. i was at the point where i was prepared for him to be walking the streets. andrea canning (voiceover): prosecutor michael perry urged patience. we knew that we did not have enough evidence to convict at that point. but that's why you go to the end. andrea canning (voiceover): there was one person in particular he wanted the jury to hear from-- donna hagan, isaiah's mom. the prosecutor had no idea what she'd say on the stand, but he had reason to believe isaiah had confided in her that day at the police station about the night halee died. so the mom takes the stand, in your words, as a reluctant witness. yes. andrea canning (voiceover): would a mother actually reveal something he told her in confidence? tell us what happened. i don't specifically remember what question was asked. but the answer that she gave was that isaiah had told her that he had shot halee and had done it accidentally. andrea canning (voiceover): and with those words, donna hagan turned the trial upside do