An 18-year-old woman who was apparently "obsessed with necrophilia," has been accused of having three-way sex on top of the corpses of two men she and her sexual partners allegedly murdered.

A police investigation into a brutal double murder in the town of Joliet, Illinois is said to have found that the bodies of 22-year-olds Eric Glover and Terence Rankins were placed in a pile after being strangled, so that Alisa Massaro could lie on them to have sex.

One of the men in the group of accused murderers, 24-year-old Joshua Miner, apparently said he was the long-term boyfriend of Massaro, adding that “for years back she wanted to have sex with a dead guy”.

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He is reported to have said that he had hoped to help Massaro with her fantasy by offering to have sex with her on top of the bodies of the two men he is accused of helping to kill.

Police reports seen by JolietPatch.com apparently state that Massaro smirked at Miner’s offer and said she didn’t want to, although she “later acknowledged she and Josh did have sexual intercourse on top of the two bodies”.

According to the documents, fellow murder accused Adam Landerman may well have joined in with the copulating couple.

The Daily Mail reported that 19-year-old Landerman is the son of a local police sergeant.

There are various accounts surrounding the double murder, as the four accused, Massaro, Miner, Landerman and 18-year-old Bethany McKee, have given the police differing versions of what happened.

According to McKee, Miner was the ringleader who came up with the plan to brutally murder Mr Glover and Mr Rankins.

She apparently said Landerman was simply a “follower” who did whatever Miner told him to do.

The police reports suggest Landerman jumped on the dead men’s bodies and “surfed”, causing the corpses to empty their bowels and emit “zombie noises”.

Police Chief Mike Trafton said: “This is one of the most brutal, upsetting things I’ve ever seen in my 27 years in law enforcement...Not only the crime scene, but the disregard for common decency towards human beings.”

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Mr Rankin's mother called the killings “demonic” and “evil”, and told how her son and Mr Glover had been friends since childhood.

Although the circumstances of the murder are still under investigation, police have said they believe drugs were involved.

Massaro’s father is said to have been shocked by what his daughter has been accused of, saying: “I don’t know what happened…I’m too devastated and I can’t talk about it.”

He apparently added: “All I can say is it’s a terrible thing that happened and I can’t believe my daughter had anything to do with it.”