An arrest has been made in the Valentine's Day murder of an elderly millionaire, who was found fatally shot inside of a Potomac, Maryland, senior living facility. Montgomery County Police said they arrested Maurquise James, 22, on Tuesday, February 24, and has been charged with attempted first-degree murder, felony assault, and using a firearm during a crime of violence. James is alleged to have killed Robert Fuller Jr. on February 14 inside the Cogir Potomac Senior Living Facility. Fuller, 87, was found unresponsive after he experienced trauma to his head in an apartment at the facility.