Mark Janney Biography

Mark Janney has been a police officer with the Montgomery County (MD) Police Department for 24 years. Det. Janney has been assigned as a plainclothes officer on a covert street crimes surveillance team; an undercover narcotics investigator and a homicide and sex crimes detective. While on the covert surveillance team Det. Janney initiated numerous on-view arrests for crimes including burglary, robbery, felony narcotics and weapons offenses and serious assaults. Det. Janney spent 12 years as a narcotics detective where he worked in an undercover capacity conducting hand to hand transactions for illicit drugs and weapons. Det. Janney was also assigned to the Major Offender/Conspiracy Unit as a lead case agent on numerous federal drug conspiracy cases. In 2011 Det. Janney was assigned to the Homicide/Sex Unit as a lead investigator. Currently, Det. Janney is assigned to the Cold Case Unit.

Additionally, Det. Janney has been an adjunct professor in Criminal Justice for the University of Maryland since 2001 and is co-owner of Signal 13 Training, LLC, which provides tactical and investigative training to law enforcement officers throughout the United States.