The gunman who attacked an Independence Day parade in suburban Chicago fired more than 70 rounds with an AR-15-style gun that killed at least seven people, then evaded initial capture by dressing as a woman and blending into the fleeing crowd, police said Tuesday.
A spokesman for the Lake County Major Crime Task Force told a news conference that the suspected shooter, who was arrested late Monday, used a high-powered rifle “similar to an AR-15” to spray bullets from atop a…