I know I'm in the minority here, but I can believe it wasn't planned ahead of time, at least not totally. Mark seems so narcissistic, I think he may have believed he could charm Dylan into deciding to move back with him. When Dylan not only refused, but said he didn't even want to visit and why, to the type of person Mark appears to be, that could be enough to make him completely lose it and kill him. It's also possible that he had planned to give him the choice and murder him if he said no, but I doubt he'll ever be honest about what his true intentions were. Whether it was premeditated or not, I still think he deserves the maximum sentence they can give him. MOO