At some stage he became the commander of the Portadown battalion of the UDA 's Mid-Ulster Brigade . On 9 September 1972 he was charged with possession of weapons and ammunition in suspicious circumstances in Lurgan . Miami Showband bomber Harris Boyle was one of those arrested with him . Kerr was later found guilty of having participated in an armed robbery on 10 March 1973 . The following year , on 29 January 1974 , he was sentenced to 18 months imprisonment for assaulting and intimidating two men seven months before
Miami Showband bomber
Miami Showband killings
Robert John Kerr