heather collins became less hopeful.e tying isaiah hagan to her daughter's murder, no gun, no dna, no eyewitnesses, nothing to prove isaiah was a killer. >> i was at the point where i was prepared for him to be walking the streets. >> 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. >> 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 haylee died. >> his mom takes the stand as a reluctant witness. >> yes. >> would she reveal something he told her in confidence? >> tell us what happened. >> i don't know what specific question was asked, but the answer was thattizy had told her he had shot haylee and had done it accidentally. >> with those words, donna hagan turned the trial upside down. instead of defending her son, she poi

heather collins has always been proud of her three girls. especially her older daughter halee. >> there's so many pictures of her holding the babysitter and just taking care of them. she is always leading the way. >> my kids wanted to feed the bottle. can i change the diaper? >> she was the best diaper changer ever. >> reporter: with halee she says she felt safe. >> she was all definitely what you picture an older sister being like. the big, protective, don't mess with my sisters or i'll come at you type. >> reporter: that protective streak continued to friends. anslee, you called her mom halee? >> yes. she would pick us up from a party. take care of us if we're sick. she acted like a mom because she was so caring to everyone. >> she was tall and everybody all of our friends were so short and always like she stuck out and didn't care. she wore heels and wedges and whatever and would go places and tower over us which made the mom thing more funny and huddle over the kids. people always -- like she was the first one they noticed. >> the world