Anna Bulchenko, 56, was fatally stabbed inside her Sheepshead Bay, Brooklyn, home on February 11, 2011. Police say Maksim Gelman came to the Bulchenko residence mid-morning with a kitchen knife, stabbed Anna and left her where she fell. He reportedly remained at the house for hours and then chased and fatally stabbed Anna’s daughter, Yelena, when she returned and discovered her mother.

According to reports from the spree that followed, Gelman had begun the morning by killing his stepfather after a family argument, then stole a Lexus and went on to attack multiple people across the city: he allegedly rear-ended a vehicle, stabbed that driver and stole the wounded man’s car, fatally struck a pedestrian, assaulted other victims, and carried out an attack on a subway rider before being subdued at the Times Square station. Authorities recovered a bloody knife and other blades; statements attributed to Gelman included the remark that she had to die.

Gelman was held without bail, indicted on multiple counts including murder, later pleaded guilty to a 13-count indictment, and received a 200-year sentence for the killings and related crimes. Friends and neighbors remembered Anna as vibrant and warm; investigators pointed to signs of Gelman’s fixation on Yelena in the neighborhood.

Did anyone in Sheepshead Bay at the time notice unusual behavior around the Bulchenko family or the graffiti shrine under the tracks?