Twenty-five-year-old Mount Vernon, New York resident Alex Sweeney has been arrested in connection with the murder of a Pennsylvania Avenue resident early yesterday morning. A person was seen running from the apartment building; police apprehended him after a foot pursuit. After he was taken into custody a fire broke out in the same residence from which he was running. After the fire was extinguished the body of an unidentified person was found. Evidence was developed, linking Sweeney to the murder. The investigation, in its early stages, is continuing by the C3I Unit, the State Fire Marshal’s Office, ATF, and the Maryland State Police.