Lieutenant Bill Grayson began his career with the San Antonio Police Department in 1989. He was promoted to Detective Investigator in April 2008 and assigned to the Sex Crimes Unit. In March 2010, he was promoted to the rank of Sergeant and soon transferred back to the Sex Crimes Unit to develop the department’s response plan to human trafficking and supervise the investigations of sexual assault cases. In 2016, Grayson submitted for and received $1.5 million in federal funding to create the S.T.O.P. (South Texas Officers and Prosecutors) task force, which was renewed in 2020. In 2017, he assumed the role of the Special Victims Unit Director, responsible for investigations involving sexual assaults, family violence and human trafficking, as well as overseeing the Victim Advocacy Unit.