Ethan Crumbley -- the accused Oxford killer -- was involved in a bizarre accident a year before he shot and killed 4 of his fellow students ... and it seems something was clearly wrong with him.
This video shows then 14-year-old Crumbley in a diner where he worked back in September 2020. Crumbley is walking in a work area and you see him disoriented and wobbly before he collapses, hitting his head on a cabinet. In the video, first obtained bythe Daily Mail, he struggles to get up before someone comes over and helps.
The diner's owner says someone on the staff called his parents and sent him home. His mom blamed it on Ethan not eating that day. But the owner has her doubts, saying she thinks it might've been related to his medications.
There's also this ... the diner owner claims Ethan's older brother, Eli, was caught smoking weed on the job -- he also worked at the diner -- and when someone on the staff threatened to call his parents, Eli allegedly responded, "Where do you think I got it from?"
Crumbley was taken into custody and charged in connection with the shooting. He's facing 24 counts total, including 4 counts of first-degree murder and terrorism causing death.
His parents have also been arrested and charged with 4 counts of involuntary manslaughter -- as prosecutors claim to have evidence suggesting Ethan's parents helped facilitate the shooting. They went on the run but were eventually captured near the Canadian border. They have pled not guilty.