From Wikepedia:
'United States law restricts possession of body armor for convicted violent felons. Many U.S. states also have penalties for possession or use of body armor by felons. In other states, such as Kentucky, possession is not prohibited, but probation or parole is denied to a person convicted of committing certain violent crimes while wearing body armor and carrying a deadly weapon. Additionally, some states outlaw the wearing of body armor while committing certain, usually violent, crimes.'
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