From the Washington Post story:
Stepfather Bobby Murphy, 62, of Mount Pleasant, told The Associated Press that the victim had the mental abilities of a 12- to 14-year-old.Murphy said he was the last family member to see Daugherty alive, on Monday, when he took her to get on a bus to Greensburg. She had both a dentist and a counselor there who helped her with a mental disability, he said. Murphy said he's not sure which one Daugherty had an appointment with, but later that day, she called home and asked permission to spend the night at "Peggy's" house. Murphy said his stepdaughter planned to return home Tuesday.
Daugherty had become involved in a community center in Greensburg where she met several people whose names she mentioned as friends, Murphy said - including several whose first names share those of some of the suspects.
"I don't know 'em personally, but Jennifer mentioned some of their names as being her friends - but evidently not," he said.