Gardai have confirmed complaints were made against Ferry by a boy when the pervert was working for youth group Foroige.
It was not until 2002 that Ferry was first found guilty of sex crimes against young boys in the Gaoth Dobhair area.
His then accuser decided not to name Ferry as the monster’s mother was very ill at the time and he did not want bring her further pain.
A Garda in the area has now confirmed that a complaint was made against Ferry back in 1986.
The Garda revealed how a number of children were interviewed about the complaint, but the complaint was then withdrawn, leaving them without their key witness.
Meanwhile a local Garda familiar with the case said he was convinced Ferry was part of a paedophile ring operating in the area at the time.
He pointed to the fact that Ferry photographed his victims while they were naked – a hallmark of paedophile rings.
The man who first came out against Ferry and brought him to court in 2002 recently told Donegaldaily.com of his trauma at the hand’s of the evil caretaker.
The man, who now lives in the south of the country, revealed how Ferry used to teach him karate and got him into holds which he could not get free from.
The man, who was just 15 at the time, said Ferry did not rape him but he was sexually molested at least 30 times.
The man also revealed how he regularly saw convicted sex offender Fr Eugene Greene at Colaiste Cholmcille when Ferry worked there.
Ferry was jailed for 18 years recently when he admitted to 38 sample charges against four boys including rape and charges of production of child pornography.