Adam was stopped by police on two separate occasions in LA, once back in 2008 and once in 2010. They were both for the same incident, for driving his Aston Martin without plates. You can actually watch the video of him being pulled over from TMZ here.
BEVERLY HILLS, CA - MAY 01: Singer Adam Levine of the group Maroon 5 performs at the UCLA Jonsson Cancer Center Foundation's "Tasted for A Cure" dinner held at the Beverly Wilshire Hotel on May 1, 2009 in Beverly Hills, California. (Photo by Alberto E. Rodriguez/Getty Images)(Photo by Alberto E. Rodriguez/Getty Images)