Updated

A relative says an 8-year-old Missouri boy witnessed a man fatally shoot his mother in an attempted carjacking, then helped his younger siblings hide before running for help.

The St. Louis Post-Dispatch reports that 28-year-old Porsha Owens was killed Monday morning in St. Louis County's Castle Point neighborhood as she led her children to her car to take them to day care. She was a school safety officer in a nearby school district.

Fannie King says her great grandson told her the gunman ordered his mother to give him her money and keys, then shot her. The gunman couldn't get the car to start and fled. King says her grandson flagged down a police officer and waited by his mother's side until an ambulance came. Detectives have no suspects.

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Information from: St. Louis Post-Dispatch, http://www.stltoday.com