Brian ##5 said spy chiefs advised him to ' start shooting ' at boys ' homes . Former Army intelligence agency claims MI5 covered up the sexual abuse . Staff jailed in 1980s for sexual abuse at notorious local 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 .