Officials with the Iowa Department of Public Safety have released additional details about the death of a Sac County woman whose body was found in a home during an investigation into a kidnapping and assault. Authorities say preliminary autopsy findings from the State Medical Examiner’s Office show that 45-year old Marilyn Schmitt died of sharp force injuries. Her death has been ruled a homicide.

Schmitt was found dead by law enforcement officials in an upstairs bedroom at her home located at 2242 Ira, Ave., Early, on Thursday afternoon, January 3rd, 2013. Preliminary investigative findings indicate Schmitt died earlier that morning. Schmitt’s son, 21-year old Kirk Riley Levin faces a felony charge of Murder in the 1st degree. Kirk Levin was arrested on January 3rd on charges unrelated to Schmitt’s death.

Levin allegedly admitted to authorities he was the only one who could have killed his mother, and that his choking her would have resulted in her death. The complaint filed against him alleges Levin stabbed his mother between the hours of 1:30-a.m. and 5:45-a.m. Jan. 3rd, in her upstairs bedroom. Levin is currently being held in the Sac County Jail.

The investigation is being conducted by the Iowa Division of Criminal Investigation and the Sac County Sheriff’s Office.