BOSTON >> Boston police are looking to bring criminal charges against one of Massachusetts' most ardent advocates of the legalization of marijuana.

The Boston Globe reports a magistrate judge will decide Tuesday whether or not to approve a complaint filed by the Boston Police Department against 57-year-old Bill Downing.

The complaint seeks to bring multiple charges of distribution of a Class C substance as well as marijuana against the Reading resident.

Police say Downing is using medical marijuana laws to hide his illegal sale of marijuana "and its extracted by-products."

Downing's attorney, John Swomley, says the complaint is an attempt to "silence the most vocal supporter of the legalization of marijuana."

A police spokesperson couldn't be reached for comment Monday night.

Swomley says he will contest the charges.

Information from: The Boston Globe,