The 27-year-old co-worker of the woman killed at a Bethesda yoga store, who originally was portrayed as a victim in the violent outburst, has been charged in the killing, three sources familiar with the case said late Friday. Montgomery County police have called a 7 p.m. news conference to announce an arrest in the case. Three sources said police have arrested the co-worker of the victim. Police originally said she was attacked and raped in the store along with the slain woman. But as detectives continued to speak with her this week, her story didn't line up with forensic evidence...