Police : The police are not the only ones who can be called upon to help in such cases. Guns included a shotgun , an AR-15 rifle , a Glock 10 mm and a Sig Sauer 9 mm . Lanza used numerous 30-round magazines to load his rifle , police say . The shotgun was found in Lanza 's parked car , police say .
Police : Newtown , Connecticut , gunman came to school grounds with four weapons . Guns included a shotgun , an AR-15 rifle , a Glock 10 mm and a Sig Sauer 9 mm . Lanza used numerous 30-round magazines to load his rifle , police say . The shotgun was found in Lanza 's parked car , police say .