S5·E6 The Narc

When Ed Tobias is found murdered after exposing his dirty co-workers to the top brass (they sold the drugs they didn't turn in), Lt. Brooks asks Matlock to defend his accused killer, Johnny Bauer, the only one in the unit who wasn't on the take. In between playing catch with Conrad, Matlock agrees to defend Bauer, even though he feels Bauer is just as dirty as his friends were because he knew what they were up to and he kept quiet.