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FCPD: Man dies after Route 1 crash into tree set vehicle on fire

A Fairfax County police SUV with lights on (file photo)

A 24-year-old man from Maryland died on Saturday (July 30) after getting injured in a one-vehicle crash on Richmond Highway more than two weeks ago.

The Fairfax County Police Department announced last night (Sunday) that Santos Casco Sierra had succumbed to injuries sustained after he drove off of Richmond Highway, also known as Route 1, near Woodside Lane in Lorton around 5:14 a.m. on July 16.

According to police, Casco Sierra was driving south on the roadway in a 2010 Ford Fusion “when the vehicle left the roadway, struck a tree and caught on fire.”

“Fire and Rescue personnel responded to extinguish the fire and extricate Casco Sierra,” the FCPD said. “He was taken to the hospital with injuries that were considered life threatening. Sadly, he succumbed to his injuries yesterday.”

Detectives with the department’s Crash Reconstruction Unit believe speed and alcohol were both factors in the crash, the FCPD says.

This is the eighth non-pedestrian fatality from a vehicle crash that the FCPD has reported this year, topping the six such deaths recorded by August in 2021. His death came on the heels of news that a motorcyclist had died weeks after veering off of Braddock Road near Fairfax County Parkway.

Casco Sierra was the third person to die after a crash on Richmond Highway this July.

A recent study of speed conducted by the Virginia Department of Transportation recommended lowering the speed limit in the northern section of the corridor from Belle Haven through Mount Vernon. The proposal doesn’t apply to Lorton, since the study’s scope ended at Fort Belvoir Road to the east.