PHILADELPHIA (CBS) — A Philadelphia high school employee is accused of selling marijuana to students.

Philadelphia Police say narcotics officers caught 31-year-old Robert Lumpkin on surveillance video selling marijuana to students at George Washington High School on school grounds.

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Lumpkin is a cafeteria worker at the high school.

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While being surveilled, police stopped Lumpkin on the 4600 block of Whitaker Avenue for a traffic violation. As a result of the investigation, a search warrant was obtained for Lumpkin’s home.

Police say they found a total of $280 worth of marijuana in Lumpkin’s vehicle and home.

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Lumpkin has been charged with possession and possession with the intent to deliver.