> reporter: katz's history of mental illness detailed in court documents obtained by nbc affiliate wbal. the legal papers from his parents' divorce a decade ago describe katz having "significant behavioral mental health issues" and being "involuntarily committed six times," adding katz "would not sleep and would play electronic games until 4:00 a.m." at one point, his mother says in the documents her son had a "potential schizophrenic break." among the 11 injured, 27-year-old alex minudic was shot in the leg. >> i didn't think i would make it out of there. >> reporter: he's trying to answer the question on everyone's mind -- why? could it simply be that somebody lost a video game, got angry and came back with a gun? >> it could be that, yes. i mean, that's ridiculous, you know? it's crazy just to think that somebody would take it that seriously. >> reporter: overnight, electronic arts, the group behind the popular madden video game, releasing a statement that says in part, "we have made a decision to cancel our three remaining madden classic qualifier events while we run a comprehensive