You left your cats with your ex-girlfriend for five weeks? That's not a pet owner who's anxious to get them back.
There's no reason she would want to keep a cat that doesn't belong to her and has a UI unless she felt that the cat had it because YOU didn't take proper care of it.
You and she had a falling out, so I think you're bringing up drugs because it's a convenient weapon to use against her.
No, you can't get the cats back before the trial unless she suddenly decides to return them.