Yelena Bulchenko, 20, was killed on February 11, 2011, in the Sheepshead Bay area of Brooklyn after a daylong rampage that began earlier that morning. Police say the attacker, Maksim Gelman, first assaulted people inside his own family home and then went to the Bulchenko residence, where he stabbed Yelena’s mother, Anna Bulchenko, to death. Gelman reportedly remained near the house for hours as if waiting for Yelena.

Yelena arrived home at about 4 p.m., discovered her mother’s body, and called 911. Authorities say Gelman was present or returned at that moment; he chased Yelena outside and stabbed her 11 times, killing her near the home. The violence continued elsewhere that day and into the night, prompting a citywide manhunt that ended the next morning in Manhattan when passengers recognized and subdued Gelman after a subway attack.

Gelman was arrested, held without bail, and prosecuted in multiple jurisdictions; he was indicted in Brooklyn on numerous counts and later pleaded guilty to charges tied to the killings and assaults. Does anyone have information about Yelena’s life in Sheepshead Bay or knew the Bulchenko family that could help shed light on that day?