Gilberto Valle, who served with the NYPD, insisted he needed to contact the alleged criminals because he was accused of being in league with them.
This does leave open the possibility that there may be more, according to the Manhattan federal court filing seen by the New York Post.
The three are identified in court papers as Michael Vanhise, 'Moody Blues' and 'Ali Khan.'
Public defender Julia Gatto wrote: 'Three weeks before trial, the defence needs to firmly know the identity of Mr Valle’s alleged co-conspirators so that it can conduct its pre-trial investigation.
'Indeed, effective trial preparation could uncover facts critical to Mr Valle’s defence in that the individuals with whom Mr Valle was chatting likely will corroborate that they were engaging in fantasy role play with no intention of acting on their fantasies.'
Valle's estranged wife Kathleen Mangan, 28, tipped off police when she found sick internet messages detailing plans to abduct, rape, cook and consume 100 female victims.
Files found on the father of one’s computer included one titled: ‘Abducting and Cooking Victim I: A Blueprint’. It listed materials required including chloroform and rope as well as chronicling the practicalities of fitting a victim into an oven – her legs, he noted, would have to be bent.
Valle also expressed a desire to cook one particular victim slowly – ‘tying her onto some form of apparatus’ and trying to ‘keep her alive as long as possible’.
In a particularly chilling section of the internet transcripts read out in Manhattan Federal Court during his bail hearing, Valle shared his hunger for ‘girl meat’ on Thanksgiving in an email exchange with an alleged co-conspirator.
His defence maintain these were nothing but fantasies and have pointed out that no women were hurt, although among his named ‘victims’ are women whom the FBI have established did indeed know Valle.
Two of them claim to have been ‘stalked in an intimidating way’ by the police officer, who served in Harlem for six years.