If you've been in a car accident in Sioux Falls, the Sioux Falls Police Department likely responded to the scene and may have the police report. This report can be an essential piece of evidence in your case, so it's important to obtain a copy, when it becomes available. As for medical treatment, local hospitals such as Avera McKennan Hospital & University Health Center and Sanford USD Medical Center and Hospital are equipped to treat car accident injuries in their ERs.