I will throw in this Jodi Arias.
It's quite amazing how she altered her appearance for the court room. I always liked this story as the graphic sexual nature of the statements in the court room.
Whilst murdering her boyfriend she looked like this.
In court she went for the church going librarian look.
I only found about this story as I was in a hotel in the US flicking through the channels and there was some court action but I heard some statements that caught my ear I watched it for hours.
Rather than explain why she may have murdered him she just kept saying all these things about him. including calling him a nonce.