LOMPOC, Calif. -

A former Santa Ynez High School student has died following last week's deadly car accident on Highway 1 near Lompoc.

Santa Barbara County Sheriff's Deputies say Ricky Santos, 18, passed away after being in the hospital for nearly a week. Santos was a student at Santa Ynez High School and ran track and field, according to his Facebook.

As of Wednesday evening, Santos' sister is still in the hospital with major injuries.

The crash happened the morning of January 31 on Highway 1 north of Jalama Road. According to the California Highway Patrol, Santos' sister was driving a PT Cruiser when a Honda Civic, driven by Mirella Hernandez, crossed the center line and hit them. Hernandez was pronounced dead the scene, according to CHP. 

Investigators believe the slick roads and speed played a factor in the crash.