From wikipedia.org:

"New York adopted a new "Son of Sam" law in 2001. This law requires that victims of crimes be notified whenever a person convicted of a crime receives $10,000 (US) or more from virtually any source. The law attaches a springing statute of limitations, giving victims an extended period of time to sue the perpetrator of the crime in civil court for their crimes and to potentially receive damages."

So if there's anything left from the Gofundme after the asshole's conviction, it can go to the victim's relatives.