Great subtilty
One of the first things BDT says to LT is "How come you never answered my letters?"
Then the last thing LT says to BDT before they start fighting is, "You're going to have to come in, son.." [meaningful brief stare]
That first fight scene has so much father/son anger released. Really well thought out, written, and filmed. The only problem I had with this film was that while these men were exceptionally trained in tracking, they sure weren't very adept and not leaving any. I would expect a little better covering up from these professionals.
Did you tell LUKE..? Is THAT who you could tell??