something, you are leaving small amounts of saliva behind. >> the pizza is taken to a forensic lab and immediately tested for dna. >> they compared that developed dna to a database, and out pops darrell wint. >> police have their suspect. a 44-year-old maryland man who worked for savopoulos at american iron works 10 years before. almost a week after the homicides, his face is everywhere. >> you need to stop what you're doing and look closely. >> the manhunt is on. >> the suspect is 34 darren dillon wint. >> he's a very violent man and the violence probably started when he was very young. >> he was born in guyana, for a short time was a u.s. marine recruit before dropping out of basic training. wint has a violent criminal past, including arrests for domestic violence, assault and burglary.