On May 21, 2007 Garrison, age 27, pleaded guilty to vehicular manslaughter and drunken driving for a December 2, 2006 crash that killed 17-year-old Beverly Hills High School student Vahagn Setian, a passenger in his car. Two 15-year-old girls were also injured in the crash. Garrison was allegedly at a party given and attended by high schoolers and was going out to buy more alcohol when his 2001 Land Rover jumped a curb at about 50 mph and hit a tree, according to authorities. He initially stated that he was just giving the minors a ride home from the high school party he was attending, but other people at the party claim he left because they ran out of alcohol. Police said Garrison had a blood-alcohol level of .20 percent, as well as cocaine in his system, although his charges only indicate that his blood-alcohol level was above .15 percent. He was charged with felony vehicular manslaughter while intoxicated, felony driving under the influence causing injury to multiple victims, felony driving with a blood-alcohol level above the .08 percent legal limit causing injury, and a misdemeanor count of furnishing alcohol to a minor. Defense attorneys also looked into whether a possible brake defect may have contributed to the accident.