SALEM (CBS) – A Salem Police officer has been charged with rape and indecent assault and battery.

Officer Brian Butler, the husband of Salem Police Chief Mary Butler, was arrested late Tuesday afternoon by the Massachusetts State Police.

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Bail has been set at $25,000. He is expected to be arraigned Wednesday in Salem District Court.

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In a letter to her officers, Chief Butler said “Though I will not get into any discussions about the incident, know that in all matters, regardless of who is involved, we must always put our integrity and the service to the public above all as it reflects on the solid reputation this Department has worked so hard to build and maintain.”

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The investigation was referred to the Essex District Attorney’s Office on Sunday afternoon. No other details have been released.