I bet some of you lawyer types would love to get this dude on the stand. He has changed his story more than a 4 year old in a room with a broken cookie jar.
What's great about a witness like this is, you don't even have to be clever or trip him up on cross-exam to discredit him. You could ask this a-hole the same question 5 times in a row and he'd give you 5 different answers.