CLAYTON COUNTY, Iowa (KWWL) -- Video from a Clayton County, Iowa sheriff's deputy's vehicle shows the startling moment when a driver rammed into the back of a squad car during a routine traffic stop earlier this week.

Around 10:15 p.m. Tuesday, Clayton County sheriff's patrol deputy Craig Johnson pulled over the driver of a truck for having one burned-out headlight. While Johnson was sitting in his car, processing that driver's information, another driver rear-ended him. The force of the collision pushed the squad car into the truck ahead.

The sheriff's office says the driver involved in the collision is 84-year-old Mary Svedsen. Chief deputy Ryan Johnson said she had a nighttime driving restriction on her driver's license at the time of the accident.

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