SACRAMENTO  (AP) — A man who sought refuge in Sacramento after aiding U.S. military forces as an electrical engineer in Afghanistan has died after being struck by a driver suspected of texting while driving.

The Sacramento Bee reports 33-year-old Mustafa Rafi and his 8-year-old son were riding bicycles Sunday when 25-year-old Desmen Lashonne Carrino of Sacramento drifted into the bike lane and hit them. Carrino had reportedly been looking down at his cellphone.

A friend and fellow civil engineer who worked with Rafi in Afghanistan says Rafi had feared that his work for U.S. forces put him in danger of being killed by Taliban forces. He had recently settled into a Sacramento apartment with his wife and children.

Rafi’s son was listed in critical condition Sunday night.