The Moses Lake Police Department has four personnel assigned to the Investigative unit. This unit comprises four detectives and a supervisor. The unit is supervised by a sergeant.
These personnel are responsible for the investigation of major crimes and to provide support to the patrol division. All of these officers have received specialized training and are experienced in the area of criminal investigations. The detectives typically work four ten-hour work days; however, they are available for call outs if the need arises.