In Season 7 of Bosch a wealthy criminal named Rogers has been implicated in a crime by a lesser criminal named Franzen. Franzen has given his story to his lawyer, Chandler, and is set to testify to the DA about Rogers' illegal activities as part of a deal to get himself out of trouble. Rogers gets his lawyer, Folks, to hire a hitman to assassinate Franzen (so he cannot testify) and Chandler (because if Franzen dies, she could then testify about what he told her as admissible hearsay). The hitman kills Franzen and puts Chandler in a coma where her recovery looks doubtful.
Then in Episode 6, Rogers and his lawyer Folks learn that Bosch's daughter Maddie was present when Franzen told his story to Chandler, so they call the hitman back to kill her as well before she can testify as to what Franzen said. But before the hitman makes the attempt on Maddie's life, he murders Folks.
There is a throwaway line between two detectives about Folks being killed because he was a "liability," but this explanation seems very thin. Folks was fully involved in the hiring of the assassin who murdered Franzen and shot Chandler, and thus is as culpable in those crimes as Rogers. In addition, he has attorney-client privilege and cannot be compelled to testify about anything Rogers told him. Worse, by having his lawyer murdered by the same hitman, Rogers only brings the crimes even closer to his own doorstep.
So how was Folks a liability to Rogers? Or did they mean that Folks was a liability to the hitman? And if that was the case, how? Folks did not even know what the hitman looked like.