Well, Ian is definitely dead now, from an apparent self-inflicted gunshot wound to the head. His suicide note confessed to murdering Alison.
But, if you paid attention throughout the episode, you will have noticed that "A" is definitely involved in what happened to Ian, because a horseshoe in the building where Ian was found was given to the pawn shop owner when "A" (or one of "A"'s associates) came by to purchase Melissa's ring that Spencer had pawned.
In other words, Ian might be dead, but the mysteries continue to grow. In the July 12 episode, we're going to see Ian's funeral. His death prompts the girls and their families to try and seek closure. After all, they think they have found Alison's killer. Spencer stays close to home to help Melissa and her parents, but Emily isn't so sure that the mysteries have been solved and continues to look for clues that they might have overlooked. Read More...