Hi everyone, I am reading "The Pelican Brief", and I don't understand the sentence 'These people don’t talk, and they don’t leave trials.' Here is the paragraph: We’ll look under every stone, K.O., but it won’t be easy. If it’s Mattiece, then we’ve got a very wealthy man in a very elaborate plot to use very talented killers to take out two justices. These people don’t talk, and they don’t leave trials. Look at our friend Gavin. We’ll spend two thousand hours digging around that hotel, and I’ll bet you there won’t be a shred of useful evidence. Just like Rosenberg and Jensen. My question is 1). who are 'these people'; 2) if 'these people are the dead ones, then what 'they don't leave trials' means? I'm lost in this context. Thanks in advance for any help.