Garrison's blood alcohol level has now been determined. Sources tell TMZ the actor's blood alcohol level was "high."
Garrison was behind the wheel when his Land Rover crashed into a tree in Beverly Hills on December 2, killing 17-year-old Vahagn Setian.
As TMZ first reported, Garrison met Setian and two 15-year-old girls hours before the crash. The teens invited the actor to a party. People who attended the party tell TMZ they saw Garrison drink between four and seven shots of Grey Goose vodka in a short period of time.
Garrison's high-powered celebrity defense lawyer, Harland Braun, tells TMZ his client was heading back to his apartment when the crash occurred.