Adacia Avery Chambers

Adacia Avery Chambers was born on May 17, 1990, in Oklahoma. She was raised in Oologah and later lived in Stillwater, Oklahoma. Publicly available records provide limited information regarding her childhood, education, or employment history. Prior to October 2015, Chambers was not widely known to law enforcement for violent criminal activity.

There is no publicly documented history indicating that Chambers was affiliated with extremist organizations or terrorist groups. Authorities later stated that she did not appear to be motivated by ideology or organized criminal intent. Before the attack, she was living independently in Stillwater and was familiar with the Oklahoma State University campus, where the annual homecoming parade took place.

On the morning of October 24, 2015, during Oklahoma State University’s annual Sea of Orange Homecoming Parade, Adacia Avery Chambers carried out a fatal vehicular attack in Stillwater, Oklahoma. The parade was held on campus ahead of the scheduled football game between Oklahoma State University and the University of Kansas.

At approximately 10:31 a.m. Central Time, Chambers drove a gray 2014 Hyundai Elantra southbound on Main Street after the parade had crossed the intersection of Hall of Fame Avenue and Main Street, where the event was expected to conclude. Traveling at speeds exceeding 40 miles per hour, she breached traffic-control barriers set up to protect spectators, struck an unmanned Stillwater Police Department motorcycle assigned to event security, and then drove into a dense crowd of parade attendees.

Chambers’ vehicle plowed into dozens of spectators before coming to a stop when its front tires mounted the curb at the southwest corner of the intersection. Emergency responders, including paramedics and firefighters who had been participating in the parade, immediately began rendering aid to the injured.

Three individuals died at the scene: Nikita Prabhaker Nakal, age 23, a university student originally from Mumbai, India; and Marvin Lyle Stone and Bonnie Jean Stone, both age 65, a married couple from Stillwater. A fourth victim, Nash Lucas, age 2, suffered critical injuries and later died at The Children’s Hospital at OU Medicine in Oklahoma City. His mother was among those injured in the crash.

In total, 47 additional people were injured, including nine children between the ages of one and thirteen. Victims were transported to multiple medical facilities across Oklahoma for treatment. Law enforcement secured the area and closed nearby streets following the attack.

Chambers was arrested at the scene by Stillwater police officers on suspicion of driving under the influence and was taken to the Payne County Jail, where she was placed in a detoxification unit. Subsequent blood testing revealed a blood alcohol concentration of 0.01, below the legal threshold for a DUI charge. Investigators continued to examine the circumstances of the crash, ultimately determining that the act was intentional.

She was formally charged with four counts of second-degree murder and dozens of assault-related charges. On January 10, 2017, Chambers entered a plea of no contest to four counts of second-degree murder and 39 counts of assault and battery with a deadly weapon. Under the terms of a plea agreement, she was sentenced to life imprisonment on each murder count, to be served concurrently, along with concurrent ten-year sentences for the assault convictions. The agreement effectively ensures she will serve a minimum of 55 years in prison before becoming eligible for parole consideration.

Adacia Avery Chambers remains incarcerated at the Mabel Bassett Correctional Center near McLoud, Oklahoma. The attack stands as one of the deadliest incidents of mass violence in Oklahoma state history and the deadliest event ever to occur during an Oklahoma State University homecoming celebration.