THANK YOU FOR PLAYING! passed on your comment to the writer and her answers to your questions are:
SPOILER
vvv
"My original idea was that Sarita's role in the triads was to take the fall for the murder Jet committed, so when Courtney started actually being able to prove her innocence it made her nervous that she was actually gonna win the trial and then she'd be free and at the mercy of the triads.
But i think i came up with the evidence for that later on down the line so it wasn't exactly consistent w the first set of evidence i presented."
And for the gunshot thing she just walked it off like a champ