WARREN, Ohio - The Trumbull County Coroner's Office says further investigation is needed before the cause of death can be determined for a 31-year-old man whose body was found in a burning van last week.

An autopsy has been completed on the body of Michael Walker, whose body was in the burning van along Pershing Avenue SW last Monday.

Before making a ruling on the death, the coroner's office says toxicology and other tests must be completed.

During attempts to put out the blaze, firefighters called for investigators because they found a body inside. 

Three years ago, the body of 23-year-old Sierra Roberts was found along the same street.

Roberts was the daughter of a Warren police officer.