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The driver who caused the fatal head-on collision on Highway 84 in Livermore during the evening commute Tuesday lost control while racing a pickup truck that fled the scene and remains at-large, the California Highway Patrol said in a case update Wednesday afternoon.

Revelations of a speed contest and the involvement of a third vehicle – a white 2015 or 2016 GMC Sierra 2500 truck – provided new context about the violent crash that killed an unsuspecting driver and critically injured one of the apparent racers.

The situation unfolded at about 6:15 p.m. Tuesday (July 15) on Highway 84, just west of Ruby Hill Drive in the area of Pigeon Pass, according to Officer Tyler Hahn of CHP’s Dublin office.

Investigators determined that the male driver of a westbound Lexus IS 250 was engaged in a speed contest with a GMC Sierra. For unknown reasons, the Lexus veered out of control into the eastbound lane and crashed into the front of an oncoming Honda Civic, according to Hahn. 

The Honda’s driver succumbed at the scene to injuries suffered in the head-on crash. He was identified as Ryan Joshua Aquino Amigable, 22, of Oakley, according to the Alameda County Coroner’s Bureau.

The Lexus’ driver sustained critical injuries and was airlifted to Regional Medical Center in San Jose, where he remained alive at last report, according to Hahn. His identity has not been revealed publicly.

It is unknown at this point whether alcohol or drugs were factors in the deadly crash, Hahn said. 

Officers are actively searching for the GMC, which fled the scene continuing west on Highway 84 that evening. The CHP described it as a lifted, four-door, heavy-duty truck with black rims and oversized tires as well as equipped with a receiver hitch, tow mirrors and chrome bumpers. 

Anyone who witnessed what happened or has other information pertinent to the crash, the at-large driver or their truck can contact CHP-Dublin at 925-828-0466 and ask for Officer G. Barajas.

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Jeremy Walsh is the associate publisher and editorial director of Embarcadero Media Foundation's East Bay Division, including the Pleasanton Weekly, LivermoreVine.com and DanvilleSanRamon.com. He joined...

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