Here you will find the connection between Jason Garrett and Dom Capers. Now, we have all heard about the Cowboys taking an interest in Vic Fangio and Greg Manusky, who are both proteges of Dom Capers. No one has been hired yet though.
Dom Capers is in the final year of his contract with the Green Bay Packers, so it is very possible that he could leave them after this season. I read an article stating that the Packers would be willing to just hand the defense over to Winston Moss after this season, who is currently their linebackers/asst head coach. The article argued the case of training Winston Moss under Dom Capers in order for him to take over, which would make a Dom Capers lateral move more likely to become the Cowboys new defensive coordinator.
Garrett is interviewing his proteges, which could mean he is investigating a little bit of Dom Capers. He won't be able to interview him until after the Falcons beat the Packers AGAIN on Saturday (Call me bold if you like). I think this is what JG is waiting for. It is either that or offer Mike Nolan the Assistant Coach position in addition to Defensive Coordinator, which makes it so it is no longer a lateral move and won't need the Dolphins' permission to do so I believe.