A search of Vitkovic 's room after the killings revealed that Vitkovic kept press clippings of the Clifton Hill massacre , with extracts underlined in red . Police believed he had always intended to shoot people in the Queen Street building . It was reported that Vitkovic had left a note at his home ; police indicated that it was not a suicide note . Vitkovic had obtained a shooter 's licence and had bought the gun a few weeks before the shooting . He had illegally modified the .30 M1 carbine , by reducing the barrel 's length . It was loaded with jacketed ammunition . In the note , addressed to his parents and dated the day of the massacre , he wrote '' " Today is going to be the day . The anger in my head has got too much for me . I 've got to get rid of my violent impulses . The time has come to die . There is no other way out . " '' The note had not been read by his parents before it was discovered by police
Clifton Hill massacre
Hoddle Street massacre
Queen Street massacre