Christian was unable to find any way to find Sebastian innocent. He tried to let it go but it kept coming back to him. While everything pointed that Sebastian was guilty, his gut told him otherwise. He thought maybe finding the real perpetrator would help. But who was the real perpetrator? He failed to figure it out.
There were numerous guests and all of them were potential suspects. It's been a few days, and it was time for the guests to return. It won't be fair to keep them here on the basis of some incident which was questionable enough to make a convincing case. Christian was busy trying to keep the balance between pack duties, now that his brother decided to devote his entire time on his mate, so that didn't leave him with much time to investigate.
