Explicit Version. Theory of a Deadman is a three piece band, Tyler Connolly on vocals and guitar with Dave Brenner on guitars and Dean Back on bass. Originally from Vancouver, B.C. and signed by Chad Kroeger of Nickelback, Theory is following up a very successful sophomore album Gasoline. Theory are road dogs who take their music to the people. This album is a balanced 13 track effort that is a polished and passionate testatment to seven years of hard work, heavy touring and diligent attention to its craft.