South Carolina ? The serial killer who terrorized a South Carolina community by shooting five people to death before police killed him Monday was a career criminal paroled just two months ago, authorities said.

Patrick Burris, 41, was shot to death by officers investigating a burglary complaint at a home in Gastonia, N.C., 30 miles from where the killing spree started June 27. Ballistics tests showed his gun matched the one used to kill residents in and around Gaffney over six days last week, said State Law Enforcement Division Chief Reggie Lloyd.

Investigators did not have an address for Burris. While evidence left no doubt he was the killer, they still had no idea why he did it.

Burris had a long rap sheet filled with convictions for larceny, forgery and breaking and entering in states across the Southeast, including Florida, Virginia, West Virginia and Maryland. He had been paroled from a North Carolina prison in April after serving nearly eight years for felony breaking and entering and larceny.