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>> and now the defense had fresh scientific evidence that boney actually put his hands on two of the victims. >> boney's story, of course, was "i ran in." "i -- i did this." "i never touched anybody." clearly not true. >> there is something in the field of dna analysis called touch dna. lab experts use human cells to make an identifying hit on a suspect. touch dna from boney's skin cells was found on kim camm's sweater, her underwear, and on her daughter, jill's shirt. >> the dna conclusively proves that he absolutely fought with kim, that he touched jill. >> and the defense hoped its cross ex...

Like this to make a shot for jill and then for bradley you would lean over a bit more and fire a shot this way. >> i noticed that you braced yourself. >> yeah >> here and this is where crime scene techs find a palm print. >> yes they did, they found a palm print up in this particular area. bu makes perfect sense that if you're leaning in you want to be able stabilize yourself, especially if you're making a shot. >> reporter: and now the defense had fresh scientific evidence that boney actually put his hands on two of the victims. >> boney's story, of course, was "i ran in." "i -- i did this." ...

Clearly not true. >> there is something in the field of dna analysis called "touch dna." # lab experts use human cells to make an identifying hit on a suspect. touch dna from boney's skin cells was found on kim camm's sweater, her underwear, and on her daughter, jill's, shirt. >> the dna conclusively proves that he absolutely fought with kim, that he touched jill. >> and the defense hoped its cross examination of boney would be still more proof. camm had to steel himself to watch boney on the stand. >> you're looking at him. >> right. there was no way for me to actually prepare myself for that...

Have was forensic evidence galore. hundreds of items recovered from his van and from hilton's suspected campsites deep in the woods. >> two items here, duct tape with hair and another piece of duct tape or masking tape with hair. >> one of the items was hilton's video camera that was retrieved. he tried to delete. >> i was able to recover those previously deleted files. >> florida department of law eens forcement lab experts had been able to salvage the audio hilton did not want the world to hear. and with good reason. this is gary hilton two days after sheryl dunlap's disappearance singing in...

Scenes showed us how the palm print would have been left by the shooter. >> it really is just as simple as reaching into the vehicle like this to make a shot for jill and then for bradley you would lean over a bit more and fire a shot this way. >> i noticed that you braced yourself. >> yeah. >> here and this is where crime scene techs find a palm print. >> yes they did, they found a palm print up in this particular area. but it makes perfect sense that if you're leaning in you want to be able stabilize yourself, especially if you're making a shot. >> reporter: and now the defense had fresh sci...