An NYPD officer who reportedly refused to enter the bloody apartment where an ax murderer left a woman nearly decapitated has resigned from the NYPD, authorities said Thursday.

Officer Sean Doohan stepped down on April 27, less than a week after he and fellow Officer Mary Sobieski were suspended for failure to take appropriate action, officials told the New York Post.

Doohan resigned even though investigators had yet to formally question him or Sobieski, police sources said.

The 83rd Precinct officers answered a call to find Angela Valle gushing blood from a head wound she suffered when her ax-wielding ex, Jerry Brown, allegedly attacked her and pal Savannah Rivera in Valle’s apartment.

Valle, 21, pleaded with the officers to go into the Bushwick Houses unit to check on Rivera—as well as Valle’s 4-year-old daughter, who was asleep in a back room when Brown allegedly burst in.

But Sobieski and Doohan reportedly balked at the request, protesting that the public housing complex is the responsibility of officers assigned to Police Service Area 3, sources have said.