Possible Involvement of Alcohol

I've been to the lake before, and a lot of swiming, smoking, and drinking happens there. Were any or all of the 3 accused instigators intoxicated during this incident? And it was a Friday night. Was the driver of the truck (nonparticipant in the violence) the only sober guy of the pack?

I suspect there might be more witnesses at Comox Lake who can give accounts of the demeanor of the 3 men hours before the verbal attack?

*UPDATE 11.7.2009* They said in an interview with Dean Stolz from CHEK that they were at the river before the incident. I wrongly heard Lake in the interview