Two serving UDR soldiers and one former UDR soldier were found guilty of the murders and received life sentences; they were released in 1998. Those responsible for the attack belonged to the Glenanne gang, a secret alliance of loyalist militants, RUC police officers, and UDR soldiers. There are also allegations that British military intelligence agents were involved. According to former Intelligence Corps agent Captain Fred Holroyd, the killings were organised by British intelligence officer Robert Nairac, together with the UVF Mid-Ulster Brigade and its commander Robin "the Jackal" Jackson. The Historical Enquiries Team investigated the killings and released their report to the victims' families in December 2011. It confirmed that Jackson was linked to the attack by fingerprints.