SURPRISE, AZ (AZFamily) – A driver has died after a crash in the West Valley late Tuesday night, according to authorities. Surprise police say around 10:30 p.m., officers were called to a single-vehicle crash near 137th Avenue and Waddell Road, just east of Litchfield Road. Once police arrived, they found the driver, 34-year-old Brett Mahoney, unconscious behind the wheel.