Aubrey McClendon drove his Chevy Tahoe into a bridge the day after he was indicted for allegedly rigging the price of oil and gas leases and it was widely assumed it was a suicide.

But a two-month investigation by the Oklahoma City Police Department has found nothing to suggest Mr. McClendon committed suicide.

McClendon was a part owner of the Thunder.

“We were unable to find any evidence or information that would lead us to believe it was anything other than a vehicular accident,” said Oklahoma City Police spokesman Capt. Paco Balderrama.

Two accident investigators and four homicide detectives interviewed witnesses as well as colleagues and family members who saw McClendon during his last days.

They scoured emails and looked for other evidence possibly indicating suicidal plans. They found none.

Police previously disclosed in March that Mr. McClendon was driving as fast as 89 miles an hour in the moments before the crash, and was still at 78 mph when he struck the concrete underpass around 9:12 a.m. He wasn’t wearing a seat belt, according to the crash report.