I think Four is trying to make is that, despite the degree of Marshall's involvement in the incident, an innocent person and teammate died. Marshall should have taken the opportunity to become a better person, a better player, a better teammate, but he hasn't. Wether it's off the field issues involving fights, to becoming an outright distraction for his team with his conduct in the lockerrom, he's failed to improve as a person and as a professional.
For that, I completely agree with Four.
I wouldn't want him within 100 miles of Valley Ranch and I'm a person who usually don't pay much attention to the off the field stuff.