DEVELOPING... Story will be updated as new information can be verified. Updated 4 times TUCSON, Ariz. — Authorities have released the name of a U.S. Border Patrol agent who was killed in a head-on crash in southern Arizona last weekend. Border Patrol officials said agent Daniel P. Cox died after he was involved in a two-vehicle collision around 12:30 a.m. Saturday on State Route 86 near Sells which is 60 miles (96 kilometers) southwest of Tucson. Cox’s age wasn’t immediately available. But John R. Modlin, Interim Chief Patrol Agent of the U.S. Border Patrol’s Tucson Sector, said in a statement that Cox was a BORSTAR Supervisory Border Patrol agent who had been on the force for 24 years.