Gov. Phil Murphy speaks at a press conference alongside Fred Guttenberg, right, the father of murdered Parkland, Florida student Jaime Guttenberg, and New Jersey Attorney General Gurbir Grewal at a press conference in Hackensack. ( But as Gov. Phil Murphy vows to tighten the state's already-strict gun laws, data shows more than three-quarters of guns connected to crimes in the Garden State come from beyond its borders.