[will4274]

Despite what you learned as a kid, you can get caught in a lie when you tell the truth. Part of the "game" of adversarial court is trying to get as many legally admissible statements from opposing witnesses as possible. Once enough statements have been entered into evidence, lawyers find contradictions - it doesn't matter how small. Humans don't say the exact same thing every time - it's not too hard to create the appearance of a contradiction where none exists - and sometimes prosecutors get it wrong and think they hear a contradiction where none exists. Good defense lawyers keep their clients (innocent or guilty) out of the witness box as much as possible.