Wilson v. Cook County involves a Second Amendment challenge to Cook County, Illinois' ordinance prohibiting the sale or possession of assault weapons and large capacity ammunition magazines. LCAV's brief, which was joined by the City of Chicago, the Major Cities Chiefs Association, and the Association of Prosecuting Attorneys, argues that the Second Amendment does not protect the possession of assault weapons and large capacity ammunition magazines. Even if the Illinois Supreme Court finds that assault weapons and large capacity magazines do implicate the Second Amendment, the brief continues, Cook County's ordinance banning them would satisfy review under any level of scrutiny.