OAKLAND (AP) — The last charge against a former Oakland police officer accused in a wide-ranging police sex scandal involving a teenager has been dropped.

The attorney for Ryan Walterhouse tells the East Bay Times a misdemeanor count of engaging in an act of prostitution was dismissed after the district attorney’s office couldn’t find the prostitute involved.

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Walterhouse had also been charged with two felony counts of conspiracy to obstruct justice after he was accused of tipping off a prostitute to an undercover FBI sting operation. A judge dropped that charges last month, saying it did not amount to conspiracy.

Last year, the teen said she had sex with about 30 law enforcement officials, including some when she was underage.

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Of the six officers charged, three had charges dropped, and two others took plea deals. Only one officer still faces five misdemeanor counts.

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