Former Braintree detective charged with allegedly using Flock, other police tools to harass his ex

Charging documents allege Mark Sherrick harassed his ex-girlfriend in a monthslong campaign “which seriously alarmed and would cause a reasonable person to suffer substantial emotional distress.”

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A now-retired Braintree police detective is facing a criminal harassment charge after he allegedly misused department technology — including Flock license plate readers — to harass an ex-girlfriend.

Mark Sherrick, 55, retired in April 2025 amid an official investigation into his conduct, Braintree officials said in a statement…

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