Bus crash tragedyDocuments say Walker, who was working as a school bus driver for a Chattanooga school district at the time, was traveling at high speeds while transporting elementary school students in 2016. Walker was convicted two years later in 2018, and sentenced to four years in prison, records show. AP3 A school bus is transported away after a deadly bus crash in Chattanooga, Tenn., on Nov. 22, 2016. AP3 Walker was convicted in the deadly bus crash and served four years in prison. APStatutory rape convictionTwo years after the deadly bus crash conviction, in 2020, the Davidson County District Attorney says Walker pleaded guilty to rape.