Oklahoma woman charged in parade crash that killed 4

OKLAHOMA CITY (AP) — A woman accused of running a red light and purposely driving around a barricade and over a police motorcycle before crashing into spectators at Oklahoma State University's homecoming parade was formally charged Wednesday with four counts of second-degree murder and 46 counts of felony assault.

Chambers' attorney, Tony Coleman, said Wednesday that a psychological evaluation performed by a forensic psychologist he retained, Shawn Roberson, indicates his client suffers from bipolar disorder and is not competent to stand trial.

Police initially suspected Chambers was driving under the influence of drugs when she crashed into the parade crowd, but Stillwater Police Capt. Kyle Gibbs said Wednesday the results of a blood test have not been returned.

Stillwater police on Wednesday also released audio recordings of 911 calls and police radio traffic in the aftermath of the crash that depicted frantic callers asking for ambulances.

While she was being booked, Chambers told jail staff that she had a history of suicidal attempts and treatment for mental health issues, and admitted feeling suicidal at the time of the crash, according to a probable cause affidavit signed by Stillwater police officer Kurt Merrill.

Chambers' father, Floyd Chambers, has said previously that his daughter had received inpatient mental health treatment several years ago, but that nothing seemed amiss recently, except that his daughter had recently called and said she wanted to move back home.