It was a tragic episode that resulted in the killing of two innocent men (one, whose throat was slit from ear to ear and stabbed 17 times, was nothing more than a Civil Rights activist). The incident also destroyed reputations and careers - up to the extent attributable to the 'rotton eggs' explanation. The story about how they were caught is quite weird, however.Again, after my time, but not one of our finest moments.
One of the four people (directly involved), had left the army and, in May 1978, contacted the police, anonymously at first, and told them he thought he knew the identity of the 'Yorkshire Ripper'. He gave the police the names of two serving soldiers from the A & SH together with an overview of what had happened in South Armagh on 23 October 1972. He was persuaded to reveal his identity and was promptly arrested and sent back to NI for questioning and then held on remand in Crumlin Road prison.
When the matter came to trial the informant was sentenced to four years for withholding information, but released almost immediately due to time served. The two senior NCOs were given life sentences. Two others, the informant, a junior NCO at the time, and a junior officer admitted lesser charges regarding withholding information.