I do hope the system has improved, because the system I served under a decent barrister would run circles around a court martial.
Chap I knew managed to inadvertantly shut down both engines in a Twin Pin which resulted in a very rapid immersion in the South China Sea. He was court martialled and employed a very smart lawyer who worked out a highly unlikely, but not impossible chain of events which could have caused the shutdown, and for which the pilot would not be to blame.
The verdict was not guilty, but the unspoken adjunct to the verdict was "we know you're guilty, you know you're guilty, so just count yourself lucky!"
Good chap and a great piss-up in the mess after he was discharged!