Who Pressed Mute on Uncle Marcus?

Who Pressed Mute on Uncle Marcus? — an adventure interactive movie in the puzzle genre with point and click elements. Every year, Abby's mom hosts a family quiz on her birthday. It's a long-standing tradition that brings the entire wealthy and eccentric family together, but one that Abby is terribly afraid of. But this year, instead of a quiz, everyone is in for a real shock. At the very beginning, her beloved Uncle Marcus tells Abby that he is dying: he was poisoned by one of his family members. Abby is the only one he trusts. You have to find out who the killer is before it's too late.