(KMOV) -- Ellisville Police are facing legal action over writing tickets to drivers who flash headlights to other drivers near speed traps.
The American Civil Liberties Union has filed a suit in federal court against the city on behalf of one driver who was ticketed.
ACLU attorney Tony Rothert says drivers are getting hit with $1,000 fines.
"What we discovered is this is a widespread practice in the city of Ellisville," Rothert told News 4.
The ACLU is taking on the case of a man who was ticketed and fined last November on Kiefer Creek Rd.
Rothert says the tickets are illegal and unconstitutional.
"The first amendment protects communication and what the police are doing is punishing people for communicating a message," he said.
City attorney Paul Martin disputes police are cracking down on flashing car lights saying Ellisville has only issued seven tickets in the last five years.
"I don't see that as a pattern or practice as alleged by the ACLU," Martin said.
The ACLU is now inviting anyone who has received a ticket in Ellisville for this to join.