mr. rickerson, his old boss in my presence in a fit of rage. he reached in to the car, grabbed mr. son by his head and snapped his neck in front of me. >> reporter: matt worked for rickerson and was fired for poor performance,ing weeks before his murder according to trial. erik jenson knew richard matt and david sweat with. he served nine months in clinton correctional facility in 2007 for possession of stolen property. he worked this the tailor shop with both fugitives and described matt as crazy. >> to chop somebody up in to pieces and you know, put him in to plastic bags and throw him in different parts of a river in my book that's kind of crazy. it is weird, the aura you get from talking to somebody. you could look at rich's eyes and you wouldn't see anything. >> blank stare. >> blank stare. >> reporter: that was creepy i would imagine. >> very creepy. >> reporter: given richard matt's ugly past, jensen said he never turned his back on him. >> he had a weirdo crime. weirdo crimes are child molesters, serial killers, dismemberers, people who do weird crimes. and do weird thing. >

mr. rickerson. >> reporter: each time they opened the trunk, it got worse. >> he snapped his fingers allay back, and grabbing ahold of his head and snapping it, there was a pop. >> you don't tell richard matt he can't have what he wants. >> reporter: matt dismembered the body and threw it in a river. after all that, the big score? some rings, a couple of credit cards, and not even $100 in cash. meantime, about 200 miles away near binghamton, new york, david sweat had launched his own criminal career. >> he did larcenies here, burglaries. >> reporter: unlike his future partner, sweat is more of a thinking man's thug. >> it seems like every crime that he was involved with, involved making lists and maps and planning. >> reporter: sweat's transition from heists to homicide took place on july 4th, 2002. this must have been a crime that just shook this community. >> it did, because it was so brutal. >> reporter: sweat and his cousin steal some firearms, and pull into this parking lot to move the stolen weapons from one car to another. >> the two vehicles that he observed were parked over ther

mr. rickerson, his old boss in my presence. and in rage he reached into the car, grabbed mr. ad and snapped his neck in front of me. >> matt works for rickerson and was fired for poor performance weeks before rickerson's murder, according to testimony at trial. eric jensen knew both richard matt and david sweat. he served nine months in clinton correctional facility in 2011 for possession of stolen property. he worked in the tailor shop with both fugitives and described matt as crazy. >> to chop somebody up into pieces and put him into plastic bags and throw him in different parts of a river is in my book, that's kind of crazy. the aura you get from talking to somebody. you can look at rich's eyes and you wonderful see anything behind them. >> blank stare? >> blank stare. >> that was creepy. >> it was creepy. >> given richard matt's ugly past, jensen said he never turned his back on him. >> he had weirdo crime. like child molesters, serial killers, dismemberers, people who do weird crimes and do weird things. >> a weirdo crime means you're not stable. >> correct. >> after matt