I've now put a lot more detail on the other thread
Ranger One
Are you a tennis fan? I'd say a 'forced error'.
The prosecutor was all very confident until he lost a few sets, then he got rattled and took a chance with a shot he should never have tried. Game, set and match to Flying Lawyer.
I'm being generous with that.
The other way of putting it is he started losing, tried a sneaky foul and got disqualified.