Police cannot punish drivers for flashing their headlights to warn others of speed traps, a federal judge has ruled in a case involving the First Amendment.
The ruling arose after police in Ellisville, Missouri, ticketed Michael Elli for using his headlights to inform motorists that officers were lying in wait to ticket those exceeding the speed limit.
The ACLU, which sued on behalf of Elli and other drivers, argued that the plaintiffs’ actions constituted a form of free speech.
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