CNN Erin Burnett OutFront September 4, 2015 23:39:00
Collecting forensic evidence. are there any footprints, dna or fingerprints left at the scene that may be helpful? >> again, there's been significant evidence collected. i will tell you that today our evidence technicians were at the scene once again. and they did recover a piece of significant evidence that wasn't found in the last few days. but i can't reveal exactly what that is or any of the other evidence, because it's extremely relevant that we keep some of this information away from the public. >> can you just give us a vague sense, was it a footprint? was it a strand of hair? anything ...