It began as a normal Uber pick-up for the mom of four moonlighting as a driver. That is until the man in the backseat put a gun to her head. According to police, that man was 22-year-old Calvin Crew, of Penn Hills, Allegheny County, who has been arrested and charged in the shooting death of Uber driver and mom of four, Christina (Christi) Spicuzza. Crew faces charges of criminal homicide, robbery and tampering with evidence, according to authorities, according to KDKA-TV in Pittsburgh, which reports: The dash cam footage recovered by police shows, 38-year-old Spicuzza begging for her life –...