A 74-year-old math professor at two Boston universities is facing charges that she ran a methamphetamine lab with her son out of their home.

Irina Kristy, 74, teaches math at Boston University and Suffolk University, the Boston Globe reported Sunday. Suffolk University placed her on administrative leave last week after learning of the charges against her.

She is scheduled to be arraigned Dec. 21 on charges of "distribution of meth, conspiracy to violate the drug law, and drug violation in a school zone," Middlesex District Attorney's Office spokeswoman Cara O'Brien said.

Her 29-year-old son, Grigory Genkin, pleaded not guilty to the same charges on Nov. 14.

Investigators searching the home they share in Somerville, Mass. -- about four miles northwest of Boston -- on Nov. 7 found evidence that meth was being made in the home. "A large amount of materials believed to be hazardous" were removed from the site, Somerville police said in a statement.

Genkin turned himself in to police in November. He is scheduled to appear in court for a pretrial conference on Dec. 20, O'Brien said.