Sean Brown (Montgomery County District Attorney’s Office) MONTGOMERY COUNTY, Pa. - Prosecutors announced charges in connection with the murder of a 19-year-old in Lower Merion Township back in September.According to investigators, Sean Brown, 19, of Philadelphia, faces first-degree murder, possessing an instrument of crime, and related charges in the death of Nahray Crisden, 19.Lower Merion Police responded to a reported shooting in the 1400 block of Surrey Lane in Lower Merion on Sept.