Update: A seventh person has died as a result of the shooting in Highland Park. On Tuesday, police said the gunman planned the attack for weeks, dressed in women’s clothing as a disguise and fired over 70 rounds into the July 4 crowd. — Update: Police took a person of interest into custody Monday evening after a massive search in connection with a shooting that left six people dead and at least 30 injured at a Fourth of July parade in Highland Park, a suburb of Chicago. -- Original post: “This kind of thing shouldn’t be happening here. And now it has. Are we safe anywhere?" Emir Gomez, 41, was visiting his parents for a Fourth of July parade Monday in the Chicago suburb of Highland Park. Minutes into the event, onlookers fled in terror after the celebration was shattered by gunfire. Six people were killed and about 24 wounded. The shooter – described as a white male with dark hair, 18 to 20 years old – was still at large, and residents were warned to shelter in place. Lake County Deputy Chief Christopher Covelli said at a news conference that the gunman apparently opened fire from a rooftop. A rifle was recovered at the scene, but the suspect should still be considered armed and dangerous, Covelli said. "We're asking everybody to stay indoors. Stay vigilant right now." This story is developing. Click the link in our bio for more updates. 📸: Jim Vondruska, @gettyimages