No one has claimed the body of prison escapee Richard Matt

Days after convicted murderer and prison escapee Richard Matt was killed during a massive manhunt in upstate New York, his body remains unclaimed.

CBS News cites "a source involved in the disposal of the body" who says Matt's remains had to be claimed by 5pm Tuesday or else it would be subject to a pauper's burial.

Local and federal authorities scoured rural upstate New York for much of the month of June in search of Matt and his alleged accomplice, David Sweat, who scrambled away from the Clinton Correctional Facility in Dannemora, New York, after hatching an elaborate escape that took them through the innermost parts of the prison.

During the search, Matt's 23-year-old estranged son, Nick Harris, told CBS affiliate WIVB he wasn't surprised his father managed to escape a maximum security prison, saying it was "shocking that nobody would really expect that."

Harris called his father a "genius," but told WIVB "I don't know him to say I respect him or not," because Matt was incarcerated for most of his son's childhood.

The escape captured worldwide attention as one of the most complex prison breakouts in history. Matt was killed Friday. Sweat was shot and captured Sunday, but was expected to survive.