Mockery Manor: The Murder Mystery Game

From BoardGameGeek:

From the makers of hit audio fiction podcast Mockery Manor comes a murder mystery envelope game set in the eponymous theme park. Gather clues, solve puzzles and interview suspects to reveal the culprit(s). Work together (or alone!) to unearth a spooky Halloween mystery at British theme park Mockery Manor in 1998. In addition to an envelope full of beautifully designed paper clues, you'll also uncover a wealth of online material, including full-cast, fully scored audio interviews and scenes. Armed with your only your trusty tape recorder, your wits, and advice from a questionably-reliable private investigator, you'll need to cross reference everything if you're going to figure out whodunnit. -description from the publisher