should be looking into it:
https://fansided.com/posts/sean-payton-reveals-how-falcons-ruined-raiders-vikings-broncos-truce-in-nfl-draft-01hwe22g2yza
"Denver was concerned about the New York Giants selecting one of those three quarterbacks. Once the Giants drafted a wide receiver, Payton said he got on a conference call with the Vikings and Raiders to tell them to not trade up and cause a spending frenzy."
McCarthy's agent should push the league to investigate - the talk was that MN was desperate to move up to get JJ, but it sounds like the bidders (MN, LV & DEN) may have decided who they each wanted and made a pact to not move up.