AIKEN -- Authorities said a suspect is in custody after an Aiken police officer was shot to death Saturday morning, the second killed in a little more than a month.

SLED said Joshua Tremaine Jones, 26, of North Augusta was arrested Saturday night in a Batesburg-Leesville home, hours after the shooting was reported near a local park.

Master Cpl. Sandy Rogers, 48, a 27-year veteran of the force, was shot while investigating a suspicious vehicle in an Aiken park about 7:30 a.m. Saturday, said Aiken Department of Public Safety director Charles Barranco. She died at an area hospital, he said.

At a press conference Saturday night, Barranco said he appreciates the public's support as his department mourns the loss of another officer.

The Aiken Standard newspaper reported that Jones was linked Saturday afternoon to another killing. Georgia officials said he is a suspect in the killing of his pregnant girlfriend, Cayce Vice, 21. She was found dead at her apartment about 10:30 a.m. Saturday by officers doing a welfare check because Vice had not shown up for her job. It wasn't clear Saturday night how long she had been dead or how she was killed.

Jones was convicted of gun violations in Aiken County and sentenced to 108 days in prison, Aiken County public records show. A full criminal record was unavailable Saturday.

Aiken police Officer Scotty Richardson was shot and killed in a traffic stop at an apartment complex Dec. 20. Another officer was shot in that incident but survived. Stephon Carter, 19, was charged with murder and attempted murder.