At a bond hearing Friday, prosecutor James Murphy said Arzuaga and his girlfriend, Yasmin Perez, 23, who also was fatally shot that night, attended the parade in the Humboldt Park neighborhood. About 9 p.m. and nearing the end of the holiday festivities, the couple, who are survived by two children, rear-ended a parked car and the car’s owner confronted Arzuaga as a group of men, including Lorenzi, approached from across the street, Murphy said.
