A driver crashes into the Oklahoma State Homecoming parade, killing four people and injuring 34.

The 2015 Oklahoma State University homecoming parade attack occurred on October 24, 2015, in Stillwater, Oklahoma, when Adacia Avery Chambers intentionally drove her sedan into a crowd watching the homecoming parade for Oklahoma State University–Stillwater on the university's campus. Four people were killed in the crash, and 47 others were reported injured. Chambers pleaded no contest to second-degree murder and assault charges, and was sentenced to life imprisonment.