The boozed-up police officer accused of raping a schoolteacher in upper Manhattan last week was once slapped with a brutality suit that cost the NYPD $25,000, The Post has learned.

Michael Pena, 27, and another cop “assaulted and battered” Anthony Mosley — and performed a vicious body-cavity search that went “beyond all possible bounds of decency,” according to the 2010 lawsuit.

The attack occurred on Aug. 15, 2009, in Harlem.

“There was no admission of wrongdoing,” said NYPD spokesman Paul Browne.

Pena was indicted yesterday in last Friday’s attack on a 25-year-old teacher.