Richland County Coroner Gary Watts says 56-year-old Joan Staub was beaten to death.
Columbia Police said on Twitter that Staub's roommate called police around 8:30 a.m. Thursday after finding the door open at their home south of downtown Columbia.
Police Chief Skip Holbrook says the crime doesn't match the pattern of any other break-ins in the area, so his investigators think the killing is an isolated incident.
Copyright 2018 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.