LEXINGTON PARK, Md. — Three Lexington Park residents face drug charges following a months-long investigation by the St. Mary’s County Sheriff’s Office Criminal Investigations Division Vice/Narcotics Unit that led to the execution of search warrants at a Sell Drive residence. Mary Theresa Dickerson, 68, Walead Othman, 59, and Lorne Cardell Gross, 59, were arrested Sept. […]