The NTSB has released its preliminary report concerning the Christmas Day plane crash that killed Sioux Falls Dr. Vaughn Mayer and his wife, JoAnn.
Investigators say the plane was flying from Grand Rapids, Michigan, when it crashed into a neighborhood in Sioux Falls.
Due to the government shutdown, neither the NTSB nor the FAA could respond to the scene. Most of the documentation was done by police.
The cause of the crash is still under investigation.