A former Victorian policeman is considering selling his house to pay for his own legal fees so he can give "truthful testimony" at next month's inquest into the Bourke Street massacre.

Former sergeant Frank Caridi told a hearing at the Coroners Court on Friday he was planning to criticise Victoria Police's response during the inquest.

Former sergeant Frank Caridi. Credit:Jason South

"I intended to provide truthful testimony and made it clear that I would be critical of Victoria Police and in particular the Critical Incident Response Team," Mr Caridi told the court.

James Gargasoulas was jailed in February for at least 46 years for what was described by the sentencing judge as one of Australia's worst examples of mass murder.