OK, new theory:
Groom’s brother was always in love with Kira, but she didn’t know he was alive, so he frames his brother for murder in order to swoop in and comfort her. 
mmm, Swedish fish… 
I am going with the lady who didnt want sophie there in the first place…was that the mother?
I’m liking Kate’s theory.
They did a good job at making Castle a youngin
i was thinking that too but strangling does not seem how a woman would kill
But then again she could be manipulating him…hmmm
Unless the marks on the neck match the beading on her veil! :eek:
Ok So you said Brothter I said one of the Dads…if you split the difference you get Uncle
Hooray! We were both half-right! 
i am late as usual. great episode. and that bride looks so familiar…
Edit…
no wonder… it was Alyssa Milano… let’ go Dodgers…