The man who killed 10 people in one of the largest mass shootings in New York City in decades was released from prison earlier this year. The killer, Christopher Thomas, shot eight children and two women in a home in Brooklyn in 1984, a crime that came to be known as the Palm Sunday Massacre.

Mr. Thomas was released in January from Shawangunk Correctional Facility in Wallkill, N.Y., after serving more than 32 years in prison.

There was only one survivor of the massacre: a crying toddler named Christina who was found on the floor, covered in blood. One of the first police officers to arrive, Joanne Jaffe, cared for the toddler that night and later helped raise her, a relationship The New York Times wrote about in 2014.