MI5 said spy chiefs ordered him to 'stop digging ' at boys ' home . Former Army Intelligence officer claims Brian Gemmell covered up the sexual abuse . Staff jailed in 1980s for sexual abuse at notorious Kincora children 's home .
Brian Gemmell said spy chiefs ordered him to 'stop digging ' at boys ' home . Former Army Intelligence officer claims MI5 covered up the sexual abuse . Staff jailed in 1980s for sexual abuse at notorious Kincora children 's home .