Board Thread:Legitimate Canon Questions/@comment-142.197.83.37-20140224221050/@comment-4091815-20140224223434

He went to the mall to get another leather jacket.

But really, he left his house mid-morning/early afternoon and returned after dark. I don't see what's odd about any of that.

As to why the Ethan and Aiden thought he was gone - no one in Beacon Hills knew Derek was back in town at that point. The last they'd heard he'd left with Cora.

The twins had already used his loft in trying to help Scott back in More Bad Than Good so they just assumed he was still out of town.