He gives Lulu a revolver , and tells her to kill herself , but she shoots SchÃ n instead . The police arrive to arrest Lulu for the murder . He gives Lulu a revolver , and orders her to kill herself , but when the Schoolboy jumps out from under the table he is distracted and she shoots SchÃ n. The police arrive to arrest her for murder despite her pleas to Alwa to let her remain free .