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Pennington County Home  > Sheriff's Office  > Law Enforcement  > Investigations
Pennington County Sheriff's - Investigations

 
The Investigations Division is located on the Third floor of the Public Safety Building at 300 Kansas City St, Rapid City, SD. Our phone number is (605)394-6115

  •  Lt Marty Graves
  •  Sgt Kraig Wood
  •  Sgt Gordon Decker
  •  Sgt Mark Hughes
  •  Call or E-mail a Crime Tip
  •  Child Abuse / Sexual Assault Unit
  •  Computer Crimes Unit
  •  Coroner's Office
  •  Domestic Violence C.A.R.E. Team
  •  Property Crimes Unit
  •  Unified Narcotics Enforcement Team
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    Lt Marty Graves

    The Pennington County Sheriff's Office Investigations Division is commanded by Lt Marty Graves. The division consists of one lieutenant, three sergeants, eleven investigators, Investigations and five detectives from the Rapid City Police Department that are assigned to our joint investigative teams.

    Lt Graves has been with the Sheriff's Office since 1995. As the commander of this division he oversees the coroners function of the Sheriff's Office along with the Property Crimes, People Crimes, Computer Crimes, Domestic Violence/CARE Team and Investigator's assigned to the Unified Narcotics Enforcement Team (UNET). Lt Graves also has oversight of six Deputy Sheriff School Liaisons assigned to various schools within the Rapid City and Douglas School Districts. Lt. Graves' original assignment to investigations began in 1997 as an investigator. He was promoted to Sergeant in 2002 and was assigned to the Patrol Division. In 2004, he was re-assigned to investigations.
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    Sgt Kraig Wood

    Investigations
    Sgt Kraig Wood supervises the day to day operation of the people and property crimes units. A major part of the people crimes unit is the joint sexual assault/child abuse team that includes assignment of three Sheriff's Office Investigators and one Rapid City Police Detective. The property crimes unit includes a team of three Sheriff's Office Investigators

    Sgt Wood has been with the Pennington County Sheriff's Office since 1997. He has been assigned to the Investigation's Division since 2002. He spent 5 years assigned to the Unified Narcotic's Enforcement Team. He has previous experience in patrol, civil and school liaison.
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    Sgt Gordon Decker

    Investigations
    Sgt Gordon Decker supervises the day to day operations of the Domestic Violence/Care Team and Computer Crimes unit. The Domestic Violence/Care team includes two Sheriff's Office Investigators, one Rapid City Police Detective and two Working Against Violence Case Managers. The computer crime unit includes a Sheriff's Office Investigator and Rapid City Police Detective.

    Sgt Decker has been with the Pennington County Sheriff's Office since 1996. He has been assigned to the Investigation's Division since 2000. He spent several years as a computer crimes investigator. He has previous experience in patrol, civil and school liaison.
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    Sgt Mark Hughes

    Investigations
    Sgt Mark Hughes is assigned as the supervisor for the Unified Narcotics Enforcement Team. He supervises a multi-jurisdictional task force with assignment of Pennington County Sheriff's Office Investigators, Rapid City Police Detectives and South Dakota Division of Criminal Investigation Agents.

    Sgt Hughes has been with the Pennington County Sheriff's Office since 1994. Prior to being assigned as the supervisor of the UNET he was a patrol supervisor.
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