David Winston is currently a forensic pathologist at the Pima County Office of the Medical Investigator in Tucson, AZ. He earned a BS in Biology at Saint Louis University and continued his education at the Medical University of South Carolina where he earned PhD and MD degrees. At the University of Virginia, he completed the Anatomic and Clinical Pathology training program and followed by a Forensic Pathology fellowship at the Office of the Medical Investigator in Albuquerque, NM. He is board certified by the American Board of Pathology in Anatomic, Clinical and Forensic Pathology. He is a Fellow of the National Association of Medical Examiners and the American Academy of Forensic Sciences and has mentored students who have presented their research at the annual meetings of both organizations. The majority of these presentations have been published in the peer-reviewed journals. He is a member of the Arizona State Child Fatality team.

Detective Hanson retired from the Tucson Police Department in November of 2016. He left with over twenty-six years of experience in law enforcement. Bill started his career as a Patrol Deputy in Mohave County, AZ, District 2/Bullhead Sector. While with the Sheriff’s office, Bill was an FTO, SWAT Operator and SWAT Team Leader. Bill transferred to Tucson Police Department in 1993 and was promoted to Detective in 1998. As a detective he worked in the Burglary, Aggravated Assault, and Homicide Units. While in the Aggravated Assault Unit, Bill started amassing his own homicide cases and was brought in to assist the Homicide Unit beginning in 2000. Bill began a full-time commitment to Homicide in 2005 and continued working his Cold Case Homicide cases until his retirement. This highly decorated Cop and veteran was the Officer of the Year in 2008. Bill also committed to over Twenty-two years in the U.S. Air Force and Arizona Air National Guard and retired as a First Sgt in 2002.