prezioso: the forensic evidence was the whole case. tell you, i believe that justice was done in this case, and absolutely the right person is in jail today. ♪ -oh, there's the captain. -captain jack. narrator: up next, everyone in town knew the local handyman. he was really tough, hardworking. really look up to him. narrator: his vicious murder makes no sense to anyone. somebody has to have an answer. the motive in this case was tragic. narrator: a crime this violent creates evidence, and some of it can't be hidden. the jury wants to see things other than testimony. they want to see forensics. narrator: and those forensics point to a pillar of the community. people had been talking to him about potentially running for governor. ♪ ♪ narrator: the town of derry is nestled in the southern part of new hampshire, just across the border from massachusetts. it's always been known as sort of a working-class town.