the print on the manila folder matched the last person anyone expected, especially stephen holmes' family. it belonged to wilson saintil, stephen's best friend, the restaurant's maintenance man and prep cook. stephen's family couldn't believe it since the two often worked late together. >> stephen would bring in cds specifically that he knew was the type of music that wilson liked so that they could put it in and it would go through the whole store and they could be listening to that music while they were working. >> wilson saintil went to the ceremonies to honor the deceased, hugged family members, cried when it was appropriate. there was no flight issues. there was no obvious signs that we needed to suspect him of anything. >> but investigators naturally went further, comparing saintil's dna to the blood droplets on the kitchen counter