Unpossible. NY has the NYSAFE Act and is a strict gun control state.
The gunman must not have brushed up on the current gun laws on his way to commit mass murder.
Just ask the author of that legislation —- Andrew Cuomo!
NYS making sure legal responsible gun owners are held on a short leash while the mentally ill and the gang bangers roam free
Plus the yutes wear only NRA shirts n'caps, and spend all day picking up litter and passing out freshly-drawn pro-life flyers, this in line with their strict adherence to a belief in the sanctity of life, even if the murderous cops, lawyers, and judges continue to pretend otherwise.