Last month, a shooting in Ferguson, MO, led to protests countered by police in military-style equipment (often army surplus). In the wake of that occurrence, there are questions and concerns about the level of militarization of local police forces. The Rapid City Journal looked at equipment in use by police in Rapid City, Spearfish, and Deadwood.
The article found the Rapid City Police Department (combined with the Pennington County Sheriff's Office for the Strategic Response Team) to have the most equipment. Body armor and an armored vehicle were on display during a July 1st standoff. Spearfish and Deadwood have almost no military equipment by comparison, although officers have access to rifles for special situations.
Additional information on local police can be found in the archive.