The Vanishing Investigator is a 1983 role-playing game adventure for Gangbusters published by TSR.
The Vanishing Investigator is an adventure scenario in which the player characters join the search for a senator and his family who went missing just prior to his Senate Committee on Organized Crime hearings. [1]
Jerry Epperson reviewed The Vanishing Investigator in Space Gamer No. 70. [1] Epperson commented that "If you are looking for a well-executed mystery, this one has all the elements, but is more of a guided tour than a 'whodunit.' Some will be disappointed by this; I was. That's why Vanishing Investigator gets only a qualified recommendation. With a little more work, this could have been really good." [1]