User blog comment:Etindel/That did NOT just happen!/@comment-85.194.80.234-20130604074413/@comment-10385544-20130604132142

The Blackfish left the hall towards the end of the feast saying that he had an appointment witn a tree. Edmure was removed to quarters with his new wife. Lord Edmure is a Tully, and now he's part of the Frey family. It would seem unlikely that the relatively weaker Frey family would want to war with both the Starks and the Tullys.

Even though Catelyn Tully Stark was killed, she was killed because of the broken vows and after she killed Lord Frey's wife. The books portray Lord Walder Frey as somewhat of a coward, always showing up to battles late enough to keep himself out of danger. It would seem unlikely that Lord Frey would command Edmure to be killed. But, there's no telling what one of the younger Frey sons would.

While it appeared to be Lord Bolton who put the final wound into Rob Stark while telling him the Lannisters were behind the attack, I'm not fully convinced of that. Bolton was Lord of Harrenhal, as deemed by King Rob Stark. The Lannisters had also rewarded Little Finger with the lordship of Harrenhal, and spoke of Bolton's lordship over it with Little Finger. But, Little Finger seemed to care little for the fact that his castle was occupied by the enemy.

My personal belief is that someone is trying to make it look like the Lannisters were behind the Red Wedding because it would be so easy to envision them as carrying out this sort of thing. This sort of subterfuge has happened before, when Tyrion was arrested in the Eyrie for attempting to kill Bran Stark.

Consider this, too. There have been a couple of attempted murders over the course of three seasons. There was the attempt to kill Bran after his fall. There was the attempt to kill Tyrion during the Battle on the Blackwater. Someone prefers to secretly kill their enemies with assassinations. And that someone prefers to use a particular intermediary to execute the details of their assassination attempts. In the case of the murder of Rob Stark AND his mother, the intermediary stands to gain the most by their deaths.