Criminal Investigations Division

The Criminal Investigations Division (CID) provides general and specialized investigative services in unincorporated St. Charles County and, upon request, to county municipal police departments. The Sex Offender Compliance & Management Unit is also managed under the Division.

Criminal Investigations Detectives

Detectives assigned to the CID are divided into two units: Crimes Against Persons and Crimes Against Property. Their primary function is to investigate reported violations of Missouri criminal law, which occurs within the county. It is also the detectives’ responsibility to gather both physical evidence and factual information required to identify and apprehend offenders and to assist the St. Charles County Prosecuting Attorney’s Office in the prosecution of those offenders. Detectives routinely serve search warrants and subpoenas in the course of their investigations.

Detectives frequently collaborate with investigators from county municipal police departments, law enforcement in the St. Louis metro area, law enforcement in surrounding counties, and federal agencies. Working collaboratively and regularly with local, state, and federal investigative agencies assists with information sharing, leads, and resources. 

Detectives are also members of the Major Case Squad of Greater St. Louis.

Sex Offender Compliance & Management

Personnel assigned to the Sex Offender Compliance & Management Unit are responsible for the complete registration of each sex offender that resides in the St. Charles County area, including all available:

  • Arrest data
  • Court paperwork
  • Deoxyribonucleic acid (DNA)
  • Fingerprints
  • Police reports
  • Up-to-date photographs

The offender information that is required by law is placed on the St. Charles County and Missouri State Highway Patrol (MSHP) Sex Offender Registry websites. 

This unit also conducts random and scheduled residency checks to ascertain offender compliance. Duties also include scheduling each offender to respond to the department for their annual, semi-annual or 90-day registration responsibilities. Personnel are responsible for responding to and/or acting on tips provided by the public, and other law enforcement agencies.