WASHINGTON (AP) — A report from a human rights group faults D.C. police for failing to investigate at least 170 reported sexual assaults over a three-year period.

Human Rights Watch is releasing the 197-page report next week. It finds that police never filed incident reports for more than a third of the sex assault cases that came in through Washington Hospital Center, where sexual assault victims are sent for forensic examinations.

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An incident report is required if any kind of investigation is done.

The report looked at a time-frame between October 2008 and September 2011.

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D.C. Police Chief Cathy Lanier says she has doubts about the report’s methodology.

The report also faults D.C. police for a callous attitude toward victims of sex assaults.

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