Earlier quoted context omitted.
"Lie" in the eye of the beholder. To the cop, stating that you touched someone means that you've opened the door -- it's a thread connecting your story to the plaintiff's. Since you are probably not routinely interrogated, your body language may reinforce that thought process as well.
In the example, the cop testifies that when he first approached the defendant, the defendant admitted to placing his hand on the plaintiff's throat, but only as a joke. The defendant claimed that he never said anything of the sort to the cop. It was the cop's and plaintiff's word against the defendant's word, and the defendant was found guilty. How would it have helped if the defendant had said nothing to the cop? Th…
It's easier to just "slip" something in a conversation if you're talking to him in the first place.