Karen Read sues the police agencies that investigated her Boston police boyfriend’s death

The complaint devotes dozens of pages to two investigators, citing communications that it says demonstrate racist, sexist and other derogatory remarks.

BOSTON — Karen Read sued the Massachusetts State Police and the town of Canton, alleging misconduct and negligence in the investigation that led to her prosecution in the death of her Boston police officer boyfriend.

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The suit filed Thursday in Bristol County Superior Court argues that Read’s acquittal last June revealed “an embedded culture of bigotry, misogyny, systemic failures, and institutional rot at the very core of both organizations.” It alleges that the town and the police department were negligent in the hiring, training and supervision of officers.

The town of Canton and the Canton Police Department did not immediately respond to email requests for comment.