The case had been handed over to Cubbon Park ACP Devaraju.
"Police felt a senior officer could handle the case appropriately," a police official told PTI here today.
The diplomat, Pascal Mazurier, is facing charges of allegedly raping the couple's four-year-old daughter.
In a written complaint to Police Commissioner Jyotiprakash Mirji, Mazurier's wife Suja Jones Mazurier yesterday alleged that she was being subjected to "hostile interrogation and the police were trying to pressurise her to withdraw the complaint" against her husband.
Mazurier, Deputy Head of Chancery in the Consulate of France here, was arrested on June 19 amid public outrage after Suja, a Keralite, alleged that he raped their daughter on June 13.
Suja said the investigating officer had been "biased in favour" of her husband right from the time an FIR was filed against him and sought his replacement.
Police said they were awaiting report of Mazurier's DNA test for proceeding further.
