Board Thread:False Info and Speculative Discussion/@comment-173.161.125.22-20150506195552/@comment-4091815-20150508195541

LoneWolf1234 wrote: I would guess that its because he felt more comfortable in the scene where the last one was killed so that's my guess

The question remains: How did the Stiles/Nogitsune know about the other one since he was locked up in a tree in Beacon Hills when all that went down with Young Chris Argent?

The "Lichen injection shared memory" theory is one possibility but again - there is no canonical answer.