UPDATE 5:12 PM

Police say Pewamo Elementary School Principal killed his 28-year-old disabled son and then fatally shot himself.

The bodies of George Heckman and his son, Grant, were found Monday night in a van in Bushnell Township.

Autopsies were performed Tuesday.

Original story below:

UPDATE 8:45 AM

Michigan State Police have released more information about the deaths of Pewamo Elementary School Principal, 52-year-old George Heckman, and his son, 28-year-old Grant Heckman. The bodies of the two men were found in a van on a two-track road in Bushnell Township in Montcalm County.

They were found after a missing person's investigation initiated by the Clinton County Sheriff's Department. The Michigan State Police East Lansing Crime Lab assisted members of the Michigan State Police Lakeview Post with processing the scene where the van was discovered.

The case is still under investigation by the Michigan State Police Lakeview Post. Autopsies have been scheduled for Tuesday morning at Sparrow Hospital in Lansing. Once the investigation is complete and the results of the autopsies have been determined more information will be released to the public.

Stay with News 10 for updates as more information becomes available.

Tragedy in Pewamo-Westphalia School District. The superintendent confirms Pewamo Elementary school principal George Heckman has died.

Superintendent Garth Cooper tells WILX, Heckman and his son were found dead in a car in Carson City Monday night. Heckman was due at a school board meeting but never showed up and that is when the search for him started.

Cooper says Heckman was expected to take over the reigns of the district as superintendent in 10 days. Cooper calls Heckman, "a champion for under dog students". Cooper also says Principal Heckman was very invested in the local community.

We are working to find out the cause of death. The school district has canceled all activities for today. Grief counselors will be at the school beginning at 9 a.m. for students and staff members in need of support.