Wilson, the former head of criminology at the Gold Coast’s Bond University, returned to court in Brisbane on Thursday for the third day of a committal hearing.
The 73-year-old faces six charges of indecently dealing with two girls under 17 in 1973 and 1976.
The former lead investigator on the case was cross examined by Wilson’s lawyer Bill Potts on Thursday.
Detective Sergeant Charles Heron confirmed the first complaint against Wilson was made in April 2011.
A second woman later made a complaint after she was contacted by Det Sgt Heron.
Both women had modified their statements several times since first making them, the Brisbane Magistrates Court heard.
One changed a statement saying Wilson had touched her shoulder to say he’d touched her breast.
Defence counsel Bill Potts suggested the women made the changes after encouragement from the detective, whom Mr Potts accused of becoming personally involved.
The lawyer read from emails Det Sgt Heron sent to one woman calling both women “most excellent” witnesses who’d told their stories “very well”.
In another email Det Sgt Heron said all police involved in the case had “not the slightest doubt” the women were abused by Wilson and there was a “good likelihood” he’d be found guilty.
“This had become some kind of campaign for you hadn’t it?” Mr Potts asked the witness during heated cross examination.
Det Sgt Heron, who was removed from the investigation after 10 months, said he didn’t see anything wrong with the emails and part of his job was to support witnesses.
Magistrate John Costello adjourned the court until May 16, when he’s due to rule on whether there’s enough evidence to commit Wilson to trial.