Lane Garrison Driver in Fatal Crash

Law enforcement sources from the Beverly Hills Police Department tell TMZ "Prison Break" star Lane Garrison was behind the wheel when his SUV crashed into a tree, killing one of the occupants.

The accident occurred Saturday night in Beverly Hills. Sources say one of the passengers, a 15-year-old girl, was in critical condition and has a relative who works for the city of Beverly Hills. One source says the 17-year-old boy who was killed went to the local high school which is presumably Beverly Hills High.

We're told Garrison was not arrested or booked after the accident. Typically, after a "K" car crash injury -- police jargon when someone is killed -- cops will ask the driver to submit to a voluntary blood-alcohol test.