Son ran over and killed mom when she tried to get her car back: cops

Oklahoma police say John Tiffin, 31, killed his mother, Karen Curthoys, after she came with another son to retrieve a car he had borrowed and not returned. During a confrontation in the driveway, police allege Tiffin reversed into his brother and pinned Curthoys between two cars; she died in hospital days later.

Tiffin was questioned and released initially, but a judge issued an arrest warrant on Tuesday. Police say officers later found him holding two knives and trying to cut his neck; he dropped them after commands and was taken to hospital before being booked. He faces charges including second-degree murder, assault and battery with a dangerous weapon, reckless driving and obstructing an officer.