I don't think the release had anything to do with gang affiliation, but that Chip Kelly decided he wasn't going to put up with DJax's behavior. They just used the NJ.com article as good timing to convince their fanbase that DJax was a criminal.
The Eagles are well within their rights to jettison Jackson. Kelly is attempting to foster a new culture at the NovaCare Complex, and he had deemed Jackson expendable. But the selfishness, the lateness, and the immaturity were there long before Kelly arrived last January.
Two Eagles players who requested anonymity said that Jackson wasn't a clubhouse cancer, but he had become a distraction. They would not offer specifics. Both questioned whether his loss would hurt the offense and opined that he wouldn't be difficult to replace...
Read more at http://www.philly.com/philly/sports/...sFSCs0PeIiF.99
Most interesting to me is the idea that Chip Kelly is so confident in his offensive scheme that he can plug in and play just about anyone at the skill positions... and that it appears many of his players believe same.