3x10 - Poltergeist: The Legacy

After a freed cop killer is killed Derek and the team investigate when it becomes obvious it was a ritualistic murder. More importantly, the murder was done using an artifact stolen from a Legacy collection on display by a former member. Though, Det. Carmack is set against allowing the team to help he has no choice as the Legacy is set on solving the case and retrieving their stolen property. Soon the investigation leads Derek to a truth he had secretly hoped wasn't the truth...