U.S. Appeals Court rules it's unconstitutional
Chalking tires for parking tickets is unconstitutional, court
Chalking tires for parking tickets ruled unconstitutional
9th Circuit Upholds Parking Enforcement Practice of Chalking Tires
Chalking tires illegal, Michigan judge says, but Saginaw gets big
Chalking tires: legal or not?
San Diego police using new system for detecting parking violations
North Bay parking police watch Michigan chalk case
Federal court case causes Aspen parking department to chuck chalk
Chalk-marking tires for parking control may be illegal
Chalking tires ruled unconstitutional in parking ticket case
What does it mean when a traffic cop “chalks” your tires? - Quora