denham refused to put out his cigarette. to avoid trouble, his friends try to force him out. >> he didn't want to leave. he was escorted off the premises by some of his friends. which he didn't take well to. >> denham is so angry, he goes home, grabs a chainsaw and returns to the bar to take revenge on his friends, but they're long gone. police say it isn't only alcohol that fuels his rage and irrational behavior. >> i think in the interim of going to the pub, he had taken some sort of drugs. we don't know what they were. for months he refuses to admit he's the chainsaw wielding man in the horrifying video. we asked him, is this your chain saw? no, i haven't got a chainsaw. absolute denial to everything. every bit of evidence put to him was absolute denial. it's the most bizarre interview taken out with somebody when it's so obvious it was him. him to deny it, it was quite unbelievable. >> but in another twist, when denham goes to court in november 2011, he pleads guilty to possession of an offensive weapon, causing grievous