ST. PETERS, Mo. (KSDK) - A St. Peters alderman is facing drug-related charges after police called to his home say they found marijuana in plain sight.

Tommy Roberts is charged with misdemeanor marijuana possession and unlawful use of drug paraphernalia. Police were called to his home on Spencer Road on Aug. 7 for a well-being check. According to court documents, police say they found loose marijuana sitting on a paper plate on the kitchen counter, and a smoking pipe on top of it. They also found a small bag of pot.

After executing a search warrant, officers found another pipe.

Roberts said he couldn't elaborate on the charges because of "pending litigation," but did say that the drugs were related to a medical issue. Last year, he was diagnosed with Hodgkin's Lymphoma cancer. According to his website, he is also a 9-year survivor of non-Hodgkin's lymphoma cancer.

Roberts was first elected in 2008 to serve as Ward 3 Alderman.

"There is no reason why a guy like me who is sick should worry about getting a ticket for having a little bit of marijuana even if I did have it. Now I am not saying I did have it and I am not saying I didn't have it. I am saying that that's a medical issue and we need to wait before I talk about it," Roberts said.

"Without getting into specifics about this case I can say that unless the state legislature tells me and all other prosecutors that we have to treat these sorts of cases differently, this case will get no different treatment than any other misdemeanor marijuana case," St. Charles County Prosecuting Attorney Tim Lohmar said

Roberts' arraignment is scheduled for September 30th. If convicted he could face up to a year in jail and/or a fine of up to $1000. According to a state statute, a misdemeanor conviction won't disqualify an alderman from continuing in office.