I'm no lawyer (and didn't stay at a Holiday Inn Express last night), but I believe the drug test results could go to lessening the zoo's responsibility, in the determining an award anyway should the zoo lose. Something about aggravating and/or mitigating circumstances?
Maybe some FReeper legal eagle could comment?
If I was a juror in this case,hearing of the victim's intoxication,I wouldn't award the plaintiffs a nickel unless I saw irrefutable proof of serious misconduct on the part of zoo staff or of an **obvious** and **glaring** design flaw in the cage.