This means a lot, coming from a criminal defense lawyer.
He should know because he's dealt with them. You might remember Spence caught the feds in altering evidence during the Weaver trial in addition to playing games with sending transcripts 4th class mail so that they would arrive late.
Oh? Are they even worse than other lawyers? Are they likely more dishonest than your typical prosecuting attorney, on his route to higher office, out to win his case at any cost?