In this case there is a connection. The man that shot the warden was a member of this gang. And, just shortly before the shooting, the prisons had done a crack down on this gang, moving some of them to different prisons to shake things up a bit.
You have a friend. You share similar beliefs and hobbies. One day he goes off the deep end and commits a "terrible crime." You have a warrant for a DUI, and they know that this guy is your friend, and they want to question you about him. They arrest you and the headline reads: Man arrested in "terrible crime" incident.