Kurt Cobain was once one of the biggest rock stars on the planet, but he was tragically lost to suicide more than 30 years ago.

Or was he?

One research team now saysit believes the high-profile death was really a staged homicide.

The Nirvana frontman was only 27 years old when he died on April 5, 1994, at his Seattle home, where he was found three days later with a gunshot wound to his head.

According to the official autopsy and investigative files, the King County Medical Examiner ruled the star’s death a suicide, citing both the fatal gunshot and a note that indicated suicidal intent discovered at the scene.

Toxicology tests also detected a high level of heroin in his system, but the examiner deduced that the gunshot was the direct cause of death and formally determined the manner as suicide.

But an independent group of researchers are willing to argue against those findings.

They believe a review of autopsy, toxicology, crime-scene photos and police files leans more toward homicide, Newsweek reported.

Their findings are not part of any official investigation, as authorities reiterate that the case remains closed as a suicide.

“In the death examination for Kurt Cobain, the King County Medical Examiner’s Office worked with the local law enforcement agency, conducted a full autopsy, and followed all of its procedures in coming to the determination of the manner of death as a suicide,” a spokesperson from King County Public Health told the publication. “We’re not able to provide specific details about what informed our conclusion, as the autopsy records are private under state law and can only be released by the next of kin.”

“Our office is always open to revisiting its conclusions if new evidence comes to light, but we’ve seen nothing to date that would warrant re-opening of this case and our previous determination of death,” the statement added.

The research team, led by forensic specialist Brian Burnett and independent researcher Michelle Wilkins, are adamant that evidence points to Cobain’s death being a homicide.

This adds to the conspiracy theories surrounding Cobain’s death.

But as of Tuesday, Cobain’s case has not been reopened, despite requests from independent researchers.

The independent researchers claim that an assailant, or a team of assailants, could have incapacitated Cobain with the help of a heroin overdose, then shot him and staged the deceased body.

According to Wilkins, Cobain’s death looked staged because there was a receipt for bullets found in his pocket.

“To me, it looks like someone staged a movie and wanted you to be absolutely certain this was a suicide,” Wilkins said, according to the Daily Mail report. “The receipt for the gun is in his pocket. The receipt for the shells is in his pocket. The shells are lined up at his feet.”

Their report also noted that the placement of heroin supplies found near the star’s body seemed abnormal due to needles that were capped.

“‘We’re supposed to believe he capped the needles and put everything back in order after shooting up three times, because that’s what someone does while they’re dying,” Wilkins said.

The researchers also noted the fluid Cobain had in his lungs, bleeding in his eyes, and damage to the brain and liver, which points more toward a heroin overdose than a gunshot wound.

Several other findings were pointed out as well, such as the location of blood stains, the position of Cobain’s hand, and the handwriting on the note discovered near his body.