Who was the killer in last week's episode of MEDIUM?

Question

I saw quite a bit of the episode with the bridal-store killing, but I missed the end, and I would like to know:
* Was the guy who came to the store and pounded on the door actually the mom's ex-boyfriend?
* What happened with the creepy online guy?
* Who did the killing?

Thanks!

Answer 1

killer was the guy at the door. he was the fiance of the bride that left her dress at the store.pretty good ending.