Police continue to investigate what they are now calling a murder-suicide that left 35-year-old Dmitriy Kanarikov and his 3-year-old son Kirill dead on the Upper West Side.
Police say that the boy's mother, Svetlana Bhukarina, had custody of the boy and was supposed to pick him up from a scheduled visit with his father Sunday afternoon.
Instead, they say the father took his son to the roof of a 52-story building on the Upper West Side.
"He picked up his son, as we all know now. Tragically, he went to building 124 West 60th Street, took the son to the roof, and all indications are he threw him off, and that's when he jumped himself."
The father's body was found a short time later on the roof of a nearby building.
The boy was found alive on another building, but later died at Roosevelt Hospital.
Kelly said that there was an order of protection against Kanarikov, who police say had threatened the boy's mother over custody.
The boy's mother wrote a message on her Facebook page late Sunday night, thanking people for their support and saying, "My son was a very sweet boy who was very much loved. He had a great life, unfortunately it was too short. Please keep him in your thoughts and kiss your children and loved ones. This is a sad and unnecessary tragedy."
It's still not clear why the father chose the building where the incident happened, though police say a friend of his may have once lived there.