The lawsuit is brought by the mother of 17-year-old John P. Crespin.
The suit alleges that the four officers followed Crespin into his driveway because his car looked suspicious, then severely beat him after he "brushed shoulders" with one of the officers. The mother says Crespin has lingering head injuries.
The officers named in the suit are Steven Castro, Todd E. Allum, Eric J. Sellars and Joey Gasca. Police did not comment to The Denver Post on the lawsuit, which was filed last month.
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