Sgt. Alan Nelson joined the University of Arizona Police Department in January, 2005. In December 2014, he was assigned to the Investigations Unit as the Detective Sgt. Previously, Sgt. Nelson served the community as a Midnight Shift Supervisor in the Field Operations Division. Sergeant Nelson additionally serves as a department firearms instructor and as a field training officer when needed. In December 2014, Sgt. Nelson was reassigned to the Investigations Unit, leading a team of five detectives. Before coming to the University of Arizona, he spent 23 years in the US Air Force as a Law Enforcement Officer.