A U.S. Army veteran driving a pickup truck that bore the flag of the Islamic State group wrought carnage on New Orleans’ raucous New Year’s celebration, killing at least 15 people.

Additionally, a 22-year-old male, 17-year-old male, and 19 year old female, all from Ionia, were passengers in the car, but are not being identified as they are not charged at this time. However, ...