CALIFORNIA, Md. — A man who police say supplied heroin to a woman who overdosed and died has been charged with murder.

The St. Mary’s County Sheriff’s Office said in a news release Thursday that 27-year-old Mark Steven Garner II of Prince Frederick was charged on Sept. 30 with second-degree murder.

Investigators say on Aug. 31, 31-year-old Barbara Ann Sneden of Mechanicsville was found dead in California, Maryland. The state medical examiner ruled that Sneden died from heroin intoxication.

Authorities say deputies in St. Mary’s and Calvert counties worked to find who supplied the heroin to Sneden. Police say witness statements, video surveillance, digital evidence and unique packaging on the drug led them to Garner.

Garner was arrested this week. Court records do not list a lawyer for him.