At one point in my rambunctious past, I was on the witness stand in a terrorism trial; the charges were against a friend of mine, and to my knowledge, completely trumped up. They questioned me over an alibi I had provided him for the date when he allegedly smashed a shop window in the middle of the night.
It turned out that, on that night, we'd met to belatedly celebrate my birthday together as I had not seen him in a while, and so I regaled judge and prosecution with a night of pub crawls where alcohol was being consumed.
The prosecutor, still holding onto the idea that my friend would have planned to go to that shop in the dead of night and alleging he might have slipped something to me about this, asked me what we talked about during all that night, to which I truthfully replied that I had no idea, as we were drinking and I couldn't remember any more. I remember that the last question the prosecutor asked me was, "what do you mean by 'you've been drinking a little'?" to which I replied, "I mean that we were completely sloshed, and I can't remember a thing beyond that", which prompted some laughter from the audience. After I'd left the witness stand, I heard from my friend that the prosecutor had later called me "dubious" and "unreliable", which I suppose from his point may be fair, as I really hadn't told him anything of use.
There was a lot that happened at that trial that didn't involve me, including the involvement of a former undercover cop who'd slept with my friend in order to - without success - extract useful information, and hours worth of surveillance footage that could have proven his innocence but turned out to have "disappeared" from the responsible police officer's desk. This continued for almost two years - during which not a single shred of evidence for my friend's guilt had ever turned up - which caused me to largely lose faith in my country's legal system, although, in the end, he was cleared of all charges and even paid a small amount of compensation - a fraction of what the trial had cost him, mind you.
Anyway, that's my story, and I'm sticking to it, your honor.