As a result of this incident McCartney joined the Provisional IRA several months later. In 1974 Martin McGuinness, who commanded the IRA in Derry, instructed McCartney to beat up an INLA man, Patsy O'Hara, who McGuinness called a "scumbag" and a "hood".
Following this incident, McCartney joined the Provisional IRA several months later. In 1974, Martin McGuinness, who commanded the IRA in Derry, instructed McCartney to assault an INLA man named Patsy O'Hara, whom McGuinness called a "scumbag" and a "hood".