Heather Arriaga, 24, turned herself in to Phoenix police on Monday evening for the manslaughter of Stephen Guardino during a road rage incident last September. Witnesses described how Arriaga shot Guardino in the neck from her car after he allegedly spit on her, then sat watching him bleed out. She faces arraignment on April 14.
Phoenix police issued a warrant for Heather Arriaga after court documents detailed her alleged role in the death of 54-year-old Stephen Guardino on September 27, 2025. The incident unfolded near the intersection of 7th and Missouri Avenues, south of Bethany Home Road and across from a Starbucks, where drivers had been aggressively maneuvering into each other's lanes and tailgating, witnesses said to AZ Family.