Documents from a police investigation into the former University of Georgia professor who fatally shot his wife and two others show he had secretly recorded a conversation between him and his wife about her affair with one of the men killed. In an application for a search warrant, Sgt. Christopher Nichols wrote that he thinks George Zinkhan was initially gathering evidence for a divorce from Marie Bruce. Nichols adds that he thinks the marketing professor killed Bruce, Thomas Tanner and Ben Teague because of an affair between Bruce and Tanner.