Talk:Derek Hale/@comment-75.177.7.159-20120808024013/@comment-195.216.6.241-20120808111716

I don't think he did lie to Scott in season 1; he did say that he'd only heard that it would cure someone who had been bitten and said that he didn't even know if it was true.

Also, he only decided to kill Peter after Scott showed him the evidence that Peter deliberately went after Laura to gain her powers; Peter had told Derek that it was an accident, which Derek believed. When he killed Peter, he'd only a few minutes or so before found out the reason Peter killed Laura, so understandably he was still angry etc.