The well-known smiling clown that crept out from behind a sign ... a vestige of car culture straight out of “American Graffiti.” Customers were served directly at their car windows.

"The word 'clown' is in a specific type of script that's consistent across each incident," he said. A similar graffiti has been found in Jackson Park, which he said Milwaukee police are looking into.

The 30-year-old Jersey City man, who asked not to be identified by his real name due to the nature of his work, spray paints positive messages and pictures ... called "acts of graffiti" can ...