"Mass murderer" Joel Cauchi Googled knives and "how to kill" before he stabbed six people to death at Bondi Westfield on Saturday.
Cauchi, a paranoid schizophrenic, had a "fixation with killing" and a "fixation with knives" police reportedly told A Current Affair crime editor Simon Bouda.
"Initially, everyone thought this was a man suffering from schizophrenia whose mind has snapped, words in his head," Bouda explained on Monday night's ACA.
"I have learned today that the investigators have been able to download data from his phone, which has indicated that he had a fixation with killings.
"He also had a fixation with knives. That tells us it wasn't a spur of the moment attack. Beforehand, he was thinking about killing, and that is terribly frightening."
Cauchi, a paranoid schizophrenic, had a "fixation with killing" and a "fixation with knives" police reportedly told A Current Affair crime editor Simon Bouda.
"Initially, everyone thought this was a man suffering from schizophrenia whose mind has snapped, words in his head," Bouda explained on Monday night's ACA.
"I have learned today that the investigators have been able to download data from his phone, which has indicated that he had a fixation with killings.
"He also had a fixation with knives. That tells us it wasn't a spur of the moment attack. Beforehand, he was thinking about killing, and that is terribly frightening."