DETROIT (AP) — Authorities say a man accused of striking a Detroit police officer and driving away has turned himself in to police.

Police say the 19-year-old was in custody Saturday afternoon after the early morning hit-and-run on the city’s west side. Chief James Craig says the unidentified officer, with the department for about a year, suffered a brain injury and is in critical condition.

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Police say the driver was speeding. His name hasn’t been released.

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Investigators say the 30-year-old officer was working to disperse a crowd after a party.

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