A man wanted for allegedly gunning down his NYPD civilian employee girlfriend — and gravely wounding a neighbor — committed suicide in Brooklyn Wednesday morning, police said. 

Pedro Cintron, 55 — identified by cops as the suspect in the Monday slaying of 51-year-old Migdalia Ortega — shot himself in the head “in public view” on McKibbin Street near Manhattan Avenue in Williamsburg around 7:50 a.m., according to authorities and police sources. 

He was rushed to the Kings County Hospital Center, where he was pronounced dead just after 8:30 a.m., according to the sources.

A gun was recovered at the scene, the sources said. 

Ortega was fighting with Cintron around 8:15 a.m. Monday inside the apartment on Fresh Pond Road near Palmetto Street when a female neighbor showed up to see what was going on, authorities said. 

“During the dispute, the 48-year-old neighbor went to check on the third-floor occupant,” Deputy Chief Julie Morrill told reporters Monday afternoon. “She was in shock and fled back to her apartment. The male suspect followed her and continued shooting.”

“There are shell casings throughout the hallway and stairwell.”

Ortega was shot in the head and the neighbor blasted in the stomach and shoulder, cops said.

Both women were taken to Elmhurst Hospital Center, where Ortega was pronounced dead and the neighbor was listed in critical but stable condition. 

“[Ortega’s] family has received support from the NYPD Employee Assistance Unit,” Morrill said. “We are doing everything we can to comfort them in this difficult time.”