Wallace was probably the first member of the security forces to attempt to draw public attention to the sexual abuse of children at the Kincora Boys' Home in Belfast. In 1973, at the request of his superior officers, he gave several journalists the name of the loyalist paramilitary leader running the home, together with his address and telephone number. He also pointed out that the man was "a known homosexual" who blackmails people into homosexual activities which he himself initiated. On 19 July 1976, "The New Statesman" published a story by Robert Fisk of "The Times" and based on Wallace's allegations about the sexual allegations surrounding William McGrath, one of the Kincora staff. Although Wallace's superiors later confirmed that they had authorised Wallace to disclose that information, a senior MI5 officer, Ian Cameron, accused Wallace of a breach of security.