Driver charged following fiery crash in Colorado that killed 4

The driver of a semi-truck is facing charges after four people were killed in a fiery crash involving 28 vehicles on a Colorado highway.

The 23-year-old suspect was charged Friday with four counts of vehicular homicide.

The pile-up happened Thursday afternoon on Interstate 70.

Investigators say the truck driver was traveling at a high rate of speed when the semi slammed into several stopped cars in a traffic jam.

Six people were taken to the hospital.