- Associated Press - Tuesday, September 2, 2014

GREENVILLE, S.C. — The gunman who opened fire on a law enforcement center died of a self-inflicted gunshot wound after killing two security guards and his stepfather in a shooting rampage spanning four days, officials in Greenville County said Tuesday.

Greenville Interim Police Chief Mike Gambrell and Greenville County Sheriff Steve Loftis gave details of the shootings at a news conference.

Area media outlets reported Coroner Parks Evans said Evan Casey Bennett, 23, died of a gunshot wound to the head Monday, moments after he shot a Greenville police officer three times. The officer underwent surgery, and his condition wasn’t known Tuesday night.

Gambrell said Bennett came to the law enforcement center wearing a tactical vest and camouflage pants and carrying a knife. Authorities say he shot out windows at the center before shooting the officer, who officials said had responded to calls for backup.

Loftis confirmed that Bennett was involved in the deaths of two security guards at a plant that was no longer in operation.

Officials said Bobby Wayne Wood, 65, and Richard Thomas Ellison, 53, were found shot to death by a newspaper carrier outside the guardhouse of the vacant plant Friday morning. Authorities think the men were killed late Thursday at the time of their shift change since only one of them is usually on duty.

Loftis described the shootings as a” senseless thrill killing.”

Gambrel said Bennett shot and killed his stepfather, Gregory Thomas Jones, after an argument at their home on Monday.