Hold court in a windowless, bland, block room. Confession is good for the soul. Get it off your chest and you'll be rewarded with a prison sentence that you would've avoided had you kept your mouth shut. Nothing you say can nor will, in any way whatsoever, benefit you. You have everything to lose and zero to gain. The interrogator, even if he likes you, CANNOT testify on your behalf (for the defense) as he works for the prosecution. He CANNOT & will not (as promised in countless hokey movies): "put in a good word for you with the judge."
A jailed person's admission of guilt IS the cops' case against that jailed person. A jailed person is a prisoner. Policemen are captors. If the cops had an actionable case against the jailed person then the jailed person's admission of guilt would be unnecessary. Don't let the cops hold court in an interrogation room. Nothing you say will be of ANY help to you. Telling your side of the story WILL NOT help you. Cops NEVER testify on behalf of those whom they've arrested and interrogated. Cops ALWAYS testify AGAINST those whom they've arrested and interrogated. If the cops have prosecutable evidence let the State's attorney exhibit it in court before a jury.