A decorated lawman who helped modernize undercover narcotics intervention and went on to handle the investigation of some of the state’s most major cases died Tuesday after a long battle with cancer. He was 66.The officer, Robert “Bob” Krofssik, served with McMinnville Police Department from 1980 until joining the Tennessee Bureau of Investigation in 1997. He began his career in law enforcement in 1971 with the Orlando Police Department before relocating to McMinnville.During his tenure here, Krofssik worked as a patrolman with McMinnville Police Department for several years before being promoted to sergeant and moved to the detective’s division.