Hung out with some bad seeds? If Lloyd didn't know Hernandez was a nutcase, he's in good company. Tom Brady, Bill Belichick, Robert Kraft, and the Boston police who investigated the double homicide in Boston were all fooled.
If liking marijuana makes him a hard criminal, then someone go to some suburban high schools right now and round up probably 60% of those kids.
But you are trampling on the guy's grave. What information now is the most information we are going to get. There was just an entire trial about his death. AFAIK, nothing legitimate was established about him being a drug dealer, a criminal, a bad guy, or anything. I don't think it's fair to assume anything about the man.