"Oh who knows," Remus said, lolling his head back on the couch with a sigh. "Like you said, it's hard to narrow anything down if we've got no probable cause. The fact that this came out of the blue and then was followed by another breakout means there is an insider in Azkaban, or at least some one strong-willed enough to overcome the Dementors."
"Peter was our friend," he added. "It still amazes me that he was capable of being a double agent. Granted, he always liked being around people more powerful than him, but I thought he was good, honestly. Blows my mind sometimes when I think about it all."
"Our best bet now it to keep our eyes and ears open. Until you get a solid lead, I'm not sure what else we can do."