The truck driver admitted he fell asleep before causing a seven-vehicle wreck on I-20 that killed four members of a Fort Worth family.

Four members of the same Fort Worth family were killed and one remains in critical condition after a big rig driver fell asleep at the wheel Saturday afternoon and collided with stopped traffic, the Texas Department of Public Safety said.

A tragic crash on Interstate 20 over the weekend has now claimed a sixth life, according to the Texas Department of Public Safety.