I looked at this young woman's FB page and something jumped out at me. I see back in the spring she started a new job as a "service master" with a company called Rock Tenn. She says (this is her verbatim comment) "It's a cleaning crew. They clean offices and stuff like that."
At my old law firm, we handled a civil case with a horrible set of facts. A woman working late in her office building was brutally attacked and raped by someone on the cleaning crew. The company who supplied the labor was sued because they did not conduct adequate background checks on this employee, and if they had done so, would have discovered several arrests for violent offenses. Fortunately this woman survived and her physical injuries mostly healed, but she almost died. She did win a significant judgment against the company to pay for her medical bills, loss of income, etc.
What I learned from that is that sometimes members of cleaning crews are hired without adequate background checks, especially if the company is short on people. I'm sure it's an angle law enforcement is considering. It is possible a person on her crew (or a former crew member) could be responsible.