Well, this piece from Stephen Moyes in today's Sun is pretty clear:
MICHAEL Jackson’s daughter has vowed to “karate chop” convicted doctor Conrad Murray to make him appear at the family’s trial.Nothing like making a daughter's distress at a doctor refusing to help her understand her father's very public death into a cartoon.
But still, if you're going to do this, you'd have a good reason for doing it, right? So, where does the 'karate chop' quote come from?
A source said: “Paris wants to kick Murray’s butt. She wants him to explain what pressure he was under to make Michael perform. When she gives evidence she plans to tear him apart.”Oddly, this unnamed source doesn't even use the words "karate chop", and it's the only quote Moyes uses.
If we assume that there really is a source, and the quote is genuine, it's difficult to see where the karate chopping came from. (If the quote was just made up, that would have been even worse - forgetting to add the actual claim you're using as your headline into the substantiating article.)
There doesn't appear to be anything else on the web where Paris Jackson "vows" to "karate chop" anybody; references to her doing so just lead back to the Sun.
So: a 'news' story which totally fails to explain where this 'vow' was made. Good to see post-Leveson that things are changing at News International.