Based on the past week alone, I have no doubt Suh is chemically imbalanced. I totally believe his expressed desire to clean up his act and lead by example (!) was sincere. That got him named captain. Almost immediately thereafter, he proceeds to assault (with intent to do bodily harm) an opposing player not even involved in the play. This tells me (and probably Goodell) that Suh cannot be trusted. Suh cannot trust himself.
Most of you are likely too young to recall the Polish boxing sensation, Andrew Golota. Golota suffered this same behavior. After continuous low blows to the sack of Riddick Bowe, He was DQed in a fight he was clearly winning....and about to become HW champion of the world. The ensuing melee, in both ring and crowd, took 30 mins to contain. Later, Golota swore he benefitted from counseling and had turned a new leaf. The 2 camps decided to stage another fight. Golota was beating the crap out of Bowe again, and again was about to become champ...but the demons got the best of him yet again. He could no longer contain himself and starting again, intentionally punching Bowe in the huevos. DQed again. He appeared genuinely remorseful but could offer no explanation for his actions. Anyone with a brain understood he was just dirty by nature and not satisfied unless hurting someone outside the rules of the sport.
I have no doubt Suh shares such demons and I question how much longer he will be allowed to play NFL football. Rolling the dice, I'd offer nothing more than a 3rd rd pick for the guy.