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Detective Constable Nicola Graham and David Nolan spoke to Granada Reports about the Alan Morris trial.
In an exclusive report, a boy who was abused by Alan Morris, a former church deacon and teacher at St Ambrose College has told ITV Granada his story.
Alan Morris was convicted earlier this year of 19 offences against 10 boys.
They took place between 1973 and 1990 at Saint Ambrose College.
But his case can only reported now after the end of a second trial at which he was cleared of similar offences.
Former pupil David Nolan withdrew his right to have his evidence heard in court so he could tell his story and follow the first case through the courts.
David tells his story in the hope it will give courage to others.
DCI Chris Bridge says 75 people came forward with information during the police investigation into Alan Morris, the retired teacher and church deacon who has been jailed for sexually abusing ten boys.
The Judge who sentenced retired teacher Alan Morris for sexually abusing ten pupils at St Ambrose College in Altrincham said he had escaped justice for so long because he had ruled with fear.
Judge Timothy Mort said many of the boys believed they had done something wrong - whether that was the case or not - and subsequently did not tell their parents.
He said Morris's abuse and breach of trust was of "a shocking degree".
Many of his victims were in court as Morris was emotionless as he was led to the cells.
Prosecutor Charlotte Crangle said a number of the victims had felt their education had suffered because of the defendant's actions and they had not made the best of their lives.
She added: "The Crown would say three victims have suffered severe psychological harm as a result."
Hugh McKee, representing Morris said that Morris had no previous convictions and had not committed any offences since 1990.
He added there were "positive aspects of his character" with a number of references to the court attesting to his later life as a deacon in "helping others to a very great extent".
The defendant, who had suffered polio, was also not in good health, said Mr McKee.
Judge Mort noted that he accepted Morris had done "a lot of good work" in his parochial duties.
A former teacher has been jailed for abusing boys at a prestigious school near Altrincham
Alan Morris was a teacher at St Ambrose Roman catholic School in Hale Barns.
Joanna White from the Crown Prosecution Service says Morris abused his powers.
A former teacher and church deacon has been sentenced to nine years in prison for abusing male pupils at a school in Altrincham.
Alan Morris taught at St Ambrose RC College in Altrincham for over 20 years.
Today he was sentenced for abusing 10 boys between 1973 and 1990.
Latest ITV News reports
A church deacon and former teacher Alan Morris who sexually abused ten schoolboys in Altrincham has been jailed for nine years.