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Thief gives investigators head start on police sketch after leaving caricature with victim

"No, we are not kidding," Riverside, California, police say after releasing a cartoon-like image drawn by the artist-turned-victim.

This alleged crime came with a big — if exaggerated — clue.

The artist's caricature of the man who he says robbed him at a festival in Riverside, California. Riverside, California, police

A man who had his portrait done by an artist at a festival this month in Riverside, California, is accused of taking off with the artist's bag and $500 but leaving the caricature behind.

"No, we are not kidding," Riverside police said in their Facebook post asking anyone who recognizes the man in the caricature to contact officials.

"This caricature is of the suspect, but of course, has exaggerated characteristics and features," police said.

During the Festival of Lights on Dec. 5, the man had his portrait completed, but when the artist was finished, he "grabbed a money bag" before running away, police said.

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Riverside is a city of 300,000 east of Los Angeles.