Yesterday afternoon at about 5:05pm, officers from District 1 responded to 77 Monument Street on a report of shots fired. On arrival officers discovered Mark Parilla, 20, of Boston suffering from multiple gunshot wounds outside that location. Boston EMS responded and transported the victim to the Massachusetts General Hospital where he was pronounced.Boston Police Homicide Detectives are asking for the public’s help and urge anyone with information about this homicide to contact them at 617-343-4470 or to remain anonymous by calling the Crime Stoppers Tip Line at 800-494-TIPS.