It is illegal to wear a bullet-proof vest while committing a murder.
2C:39-13. Unlawful use of body vests 1.Unlawful use of body vests. A person is guilty of a crime if he uses or wears a body vest while engaged in the commission of, or an attempt to commit, or flight after committing or attempting to commit murder, manslaughter, robbery, sexual assault, burglary, kidnaping, criminal escape or…