And to the same question I would answer, "I know who he is (followed by the explanation of how I know who he is) but I've never spoken to him, and I don't know him." In other words, we're each defining what that means and without being prompted we're explaining why we answered the way we did, and neither of us would be lying.
I don't know if J17 was trying to get on the jury. She very well may have. And she didn't offer up information that she had. We might consider it lying but is it lying in the legal sense? I don't know.
And the bottom line here is "do you have feelings toward him" - aka feelings that will cause you to lose perspective and be impartial.
She clearly did, whether she "knew" him or not. I'd guarantee you IF for some reason - aka life - she's 'forgotten' who the prosecutor was (someone mentioned this all happened quite a few years ago AND more importantly the fact that they were still very young - hey the young forget) - anyway, IF she had forgotten, someone in her family reminded her. Guaranteed. My 2 cents. JMO