Brighton Beach’s Kostyantyn Proskurnyak Fatally Stabs Step-Father, Injures Sister Before Taking Suicidal Plunge

Responding to a 911 call, police arrived to a gruesome scene early this morning: a 59-year-old man was stabbed to death in his apartment on Ocean View Avenue; outside the building, the crumpled body of his 30-year-old stepson was splayed on the pavement with severe trauma; and just a few blocks away, the pregnant sister of the younger man, a 29-year-old woman, was found bleeding from stab wounds to her back, wrist and forehead.

The female victim phoned 911 at approximately 2:30am. The 59-year-old, Voclodymyr Yeushchenko, was pronounced dead by EMS inside his 1070 Ocean View Avenue apartment building, just across the street from elementary school PS 225.

The 30-year-old, Kostyantyn Proskurnyak, who lived in the same apartment, was rushed off to Coney Island Hospital, where he too was pronounced dead.

His sister, the 29-year-old, was picked up by first responders at Brighton Beach Avenue and Coney Island Avenue . She was taken to Lutheran Medical Center, where she is listed in stable condition.

The investigation is ongoing, but cops told the Daily News that they believe Proskurnyak got into a heated argument with his stepfather, Yeushchenko. It escalated until he drew a knife and stabbed him in the neck. Proskurnyak’s sister tried to intervene when she was stabbed in the head, back and wrist.

The sister darted out of the apartment to safety, where she phoned cops, according to the News. The New York Post adds that the woman is pregnant.

As Yeushchenko bled to death, cops believe Proskurnyak went to an upper floor or the roof, where he took his life in a suicidal leap.

The investigation is ongoing, according to police.