Police investigating the assassination attempt yesterday in Arizona said "there is some reason to believe [Jared Loughner] came to this location with another individual, and that individual is involved." They've released a picture. (Updated: Man pictured is cleared of involvement)
Via the NYT's Caucus blog, the Pima County sheriff's office says the man pictured above was questioned and released. He is a taxi driver and had given suspect Jared Loughner a ride to the scene and walked inside the grocery store to make change.