The investigator plays a crucial role in deception as they are tasked with solving the murder mystery. Their primary responsibility is to gather clues and ask strategic questions during gameplay in order to correctly identify who the murderer is among the players. Investigators need to carefully observe other players' actions, listen to their answers, and analyze gathered information in order to make informed deductions. It is important for investigators to be astute, attentive, and discerning when interacting with other players in order to unravel the web of deception created by both the murderer and accomplice.