Brian began his investigative career in the Central District Tactical Unit of the Chicago Police Department where he was assigned to the street crimes unit working covertly in narcotics and prostitution enforcement as well as crime patterns involving rape, armed and strong-armed robbery, burglary, pickpockets and auto theft. Brian was promoted to the rank of detective after five years of the tactical assignment and immediately assigned to the Special Investigation Unit (SIU) which was a covert unit formed after the discovery of thirty-three children who were murdered by John Wayne Gacy. This unit, which developed into a local, state and federal affiliated team, targeted those who sexually exploited children through child pornography, juvenile pimping and pandering (human trafficking) and molestation. The unit also focused on those selling narcotics to children.

For the past four years Tom has been an instructor for NCJTC in various class including Child Homicide, Cold Case Homicide and Major Case Investigations. Mr. Biesty was an accomplished and well-respected attorney and leader in the Cook County State’s Attorney’s Office with a 26 year record of prosecutorial excellence. He has an extensive trial experience across a wide spectrum of cases including many first-time prosecutions for the State of Illinois. For 15 years Tom was a Supervisor in Cook County State’s Attorney’s Office in Chicago, IL. Some of his responsibilities include, but are not limited to, coordinating investigations among various law enforcement agencies and applying new methods and science to solve cold case crimes. Tom has been the recipient of numerous awards in 2015 and 2013 the Award of Excellence from the Illinois Homicide Investigators Association.