His mom has already been arrested in the past for providing false testimony to police. Could you please provide me a link where the brother has done the same? okthanxbye. There is no reason to believe the brother doesn't have credibility unlesss you REALLY, REALLY want Dez to be guilty of .. well .. something. Anything. Which you've clearly demonstrated you do, in which case I can see where the eye witness at the scene would have absolutely no credibility in your eyes since it goes against the grain of your desired outcome.