(AP) — An off-duty Memphis police officer who died after being shot multiple times had been on the force for little more than a year and had a fiancee who is four months pregnant, authorities said. Police have charged 29-year-old Tremaine Wilbourn, who was on probation for an armed bank robbery, with first-degree murder in Bolton's death. Officer Tim Warren was killed while responding to a shooting at a downtown Memphis hotel in July 2011.