Highland Park Mayor Nancy Rotering noted on the Today show that Crimo’s online postings “reflected a plan and a desire to commit carnage for a long time in advance,” Newsweek reports.

“And it’s one of those things where you step back and you say, ‘What happened? How did somebody become this angry, this hateful?’ To then take it out on innocent people who literally were just having a family day out,” Rotering continued, NBC News reports.

Rotering said the gun violence discussion should center on “the fact that there are weapons of war on our streets, that people can legally obtain these and then take out dozens of people,” CNN reports.

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