An NYPD sergeant accused of raping a 15-year-old girl he met online was found dead Thursday morning in a house in Brooklyn of an apparent suicide, officials said.

The body of Joel Doseau, 43, was found by workmen inside what was reported to be his childhood home in the Canarsie section, officials said.

Police responding to the scene found Doseau with a bag over his head, said a law enforcement official. The bag was attached by piping to what may have been a propane tank, the official said.

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Doseau was indicted earlier this month on multiple counts of rape, sexual abuse and misconduct. The charges alleged that Doseau began a sexual relationship with the girl, now in her 20s, when she was 15.

Doseau and the girl met several times to have sex in Brooklyn between July 2007 and August 2009, according to the 40-count indictment.