Concord Police Department records indicate Hill was cited Tuesday - two days before players report to training camp - near Charlotte Motor Speedway for possessing two grinders with marijuana residue and a marijuana bowl used to process, prepare and store.
Hill, 24, spent last season on the Panthers practice squad.
The former Georgia Tech standout was drafted in the second round in 2012 by the Jets, but quickly fizzled out in New York after dropping too many passes.
Panthers coach Ron Rivera praised Hill for his strong work during minicamp and OTAs, saying he'd made big strides. Hill is expected to battle for Carolina's sixth wide receiver spot with Brenton Bersin and Jarrett Boykin.
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