Four murder suspects pleaded not guilty on Tuesday to the murder of two 22-year-old African American men in Joliet, Ill. - but no one is allowed to say what's in the indictment.

The judge in the case ordered the indictment to be sealed and placed gag orders on the attorneys, prohibiting anyone from discussing the indictment or any changes in the case. Sealed indictments are rare, but usually occur when judges feel that releasing the information will dilute the integrity of the defendants' right to fair trial.

The four suspects - Adam Landerman, Alisa Massaro, Joshua Minor, and Bethany McKee - are accused of strangling Eric Glover and Terrance Rankins. Police allege that Minor and Massaro then proceeded to have sex on top of the dead men, who had bags tied around their heads. Glover and Rankins' bodies were found in January in the home of one of the suspects.

According to reports, Massaro, 18, was "necrophilia-obsessed." "For years back she wanted to have sex with a dead guy," said Massaro's boyfriend and co-defendant Minor.

Necrophilia is an erotic attraction to corpses. Individuals with the obsession tend to spend an abnormal amount of time thinking about corpses, even having recurring sexual fantasies involving dead bodies. Treatment for necrophilia is "usually not sought" because necrophilia is seen in the medical community as more of a fetish than a disorder. It is not until necrophiles act on their urges that the fetish becomes problematic. And, the thinking goes, most of them rarely do.

It seems that Massaro may have been one of the rare necrophiles who gave into the urge. But, since we have no chance at taking a peek at details of the indictment, we'll have to wait until the case goes to trial to find out.