The Iowa Division of Criminal Investigation said Steven Graesch was found dead by police at 1932 Des Moines Street in Webster City at about 2 a.m. Monday.
Authorities believe the 61-year-old had an altercation with his son, 27-year-old Corbin Graesch, in the early morning hours of Saturday.
Steven died as a result of that altercation.
An autopsy will be performed Tuesday on Steven.
Corbin is in the Hamilton County Jail charged with first degree murder.