A rookie police officer has resigned, after it was revealed that he and his partner failed to assist EMS who wanted to access an apartment where a woman had been murdered.

Officer Sean Doohan resigned on April 27th, a week after the brutal killing of Savannah Rivera and attempted murdered of Angela Valle on April 20th. Valle, who was stabbed all over her body, had managed to flee the scene and flag down an Uber driver, who called 911. Valle told emergency responders her friend, Savannah Rivera, was in her apartment at 811 Flushing Avenue.

When police went to the 8th floor apartment, they found Rivera, 20, dead with stab wounds all over her nearly decapitated body. Valle's four-year-old daughter was found uninjured in a bedroom.

The NY Post reported last week that Doohan and his partner Officer Mary Sobieski, assigned to the 83rd Precinct, allegedly "listened to Valle’s account of the attack" at 1:16 a.m. "but refused to set foot in the building... By 1:40 a.m., they told dispatchers that the assignment was a completed assault, according to sources." Then officers assigned to public housing "took over," according to the Post's sources: "But by 2:01 a.m., they too left, first to finish paperwork at their home base, then to check on Valle, by then at Elmhurst Hospital, sources said."

EMS finally entered the apartment around 2:30 a.m.—after a "FDNY lieutenant told the NYPD sergeant that the cops allegedly blew off his request for help"—and found Rivera and Valle's daughter.

The Uber driver who called 911 was surprised at the police reaction to Valle's pleas. Driver Boshra Azer told the Daily News, "She was telling everyone, ‘Please help my daughter, please help my daughter.' When the cops came, I asked them, ‘What about the daughter, she’s a hostage?’ They said to me … they can’t get in the house. There are other cops who can get in the house."

A source told the Post that Doohan resigned because "[h]e was going to get charges... Resigning will allow him to get another law-enforcement job."

Officer Sobeiski, who had been suspended in the wake of the incident, is reportedly back at work. She is the subject of an investigation.

Jerry Brown, Valle's ex-boyfriend, was arrested and charged with murder, attempted murder, and assault. Police recovered a bloodied hatchet in the building, and Brown, 34, turned himself in after a PIX 11 producer called him. He told the producer he had no memory of what happened: "Somebody woke me up. I have a staple in my head. I woke up on the floor. I was drifting in and out of consciousness. I was on the floor in the hallway of a building."