I cannot fathom how this man, bribed with lessor charges, can be allowed to testify in court.  We know he is a bad man because he has pleaded to the reduced charges.  Bad men are known to value truth little compared to personal advantage.  So this dude bought himself a deal by promising to testify against his former buddies.  As a juror, I would reject his testimony as bought if it were revealed in court that he was bribed with a plea bargain.