Shades of A Few Good Men

Of course, AFGM came out 3 years later, but much of its plot is similar to TB’s – a good lawyer doing work that’s beneath his abilities/morals turns down a plea/reduced sentence offer and is first sure he’s made a huge mistake (as are the clients and their families), then goes for broke with unorthodox tactics and triumphs.

"The Verdict" also came to mind.

My people skills are fine. It's my tolerance of morons that needs work.