HARRISON COUNTY, Iowa – The Iowa Department of Public Safety today (Monday), said that at approximately 4:30-p.m. Sunday, on April 21, 2024, the Harrison County Sheriff’s Office responded to a call of a vehicle rollover south of Modale (Iowa). When deputies arrived on scene, they contacted the driver of the rollover, identified as 22-year-old Sebastin O’Brien of Little Sioux, Iowa. O’Brien became combative with deputies, and after a short struggle, deputies placed O’Brien into custody.

Upon further investigation, it was learned the rolled-over vehicle did not belong to O’Brien. Harrison County deputies went to the residence of the vehicle’s registered owner and located the owner deceased inside the residence. The name of the deceased individual is being withheld pending notifications to family members. As a result of evidence collected, O’Brien was charged with Murder in the 1st Degree and taken to the Harrison County Jail. Additional charges are pending.

The criminal investigation is being conducted by the Harrison County Sheriff’s Office with assistance from the Iowa Division of Criminal Investigation and Iowa State Patrol. The deceased male was transported to the Iowa Office of the State Medical Examiner in Ankeny where a forensic autopsy will be performed this week.

Homicide suspect Sebastin O’Brien

The investigation is ongoing, and no other information will be released at this time. Note: A criminal charge is merely an accusation, and a defendant is presumed innocent until proven guilty.