JACKSON, Miss. -- The Oxford police chief says Mississippi guard Marshall Henderson appeared to be in possession of a small amount of marijuana and cocaine during a traffic stop in May.

Henderson, a 6-foot-2 senior from Hurst, Texas, was suspended indefinitely by coach Andy Kennedy on Wednesday for "violation of team rules," but no other reason was given.

The Wall Street Journal first reported the traffic stop, citing a police report.

Chief Joey East confirmed the incident Thursday, saying Henderson was cited for not having proof of insurance. He said no other charges were filed.

East said officers told him Henderson was "very cooperative" during the stop and "it's not uncommon" for police to find small amounts of a suspected controlled substance but file no charges because of a cooperative suspect.