His 19-year-old brother, Lucio Garcia-Sanchez, is also facing charges.
The brothers are originally from Mexico, investigators say, and are in the country illegally.
Police say the brothers were travelling eastbound on Route 70 while on their way to work at a sprinkler company in Medford. They broadsided a car heading north on Troth Road.
That car was driven by Amy Voorhees, 27, who was killed.
Voorhees was a 7th grade language arts teacher and softball coach who was driving to work at DeMasi Middle School.
Police say their investigation revealed that, immediately after the crash, Galindo-Sanchez advised his brother to leave the scene in an effort to thwart law enforcement from collecting information regarding the incident.
Police found Garcia-Sanchez walking away from the collision site approximately a quarter mile from the intersection.
Authorities say the crash is still being investigated to determine whether or not there was criminal conduct associated with the operation of the pickup truck.
Jose Luis Galindo-Sanchez is charged with Hindering Apprehension, Obstruction of Justice and Witness Tampering.
Lucio Garcia-Sanchez is charged as a Material Witness.
U.S. Immigration and Customs Enforcement has placed detainers on both men.
Voorhees had taught at the DeMasi Middle School for three years.
The school lowered their flags at half staff in her memory. Grief counselors were also made available at the school.
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