Regional Major Crimes Units (MCU) investigate cases of homicide, suicide, unexplained deaths, in-custody deaths, officer involved use of deadly force events, adult sexual assaults, robbery, and other serious crimes against person(s). Regional MCU personnel serve as a ready resource for patrol personnel who respond to suspicious deaths, and other serious, complex investigations. Integration of ABI personnel and patrol personnel proves to be highly effective in coordination and resolution of investigations. The MCUs are the backbone of the Alaska Bureau of Investigation as they handle calls for assistance from nearly every law enforcement entity within Alaska. These units work intricately with other ABI units because many types of crimes are often interconnected. Investigators assigned to the Major Crime Units are located in Soldotna, Fairbanks, Palmer, Bethel, and Anchorage. In addition, they remain available for deployment to any area of the state.