The family of 15-year-old Aleksandar Makulev, who died in the "Petrohan-Okolchitsa" case, wants his body exhumed so any DNA still on it can be tested, his father Yani Makulev said in an official statement. Lawyers for the relatives of all three victims have signed the document.

For the first time, the relatives are publicly disputing the prosecution's account of the case, point by point. Besides the exhumation, they want everyone who was present at the autopsies questioned, and new interviews with the girl who was traveling with the group, along with her mother and father. They're also calling for further tests.

"We don't accept what was said at the prosecution's September 14 briefing as established fact," Yani Makulev wrote.

The biggest gap the relatives point to is the time of death. Both the initial report and a later review by three forensic experts put death at 24 to 48 hours before the bodies were found. At the briefing, Associate Professor Aleksandar Aleksandrov, head of the forensic medicine clinic at Alexandrovska Hospital, gave a different window — 5 to 7 days before the bodies were examined.

The relatives say there have been many expert reports, yet prosecutors and investigators still call it only likely, not confirmed, that Kalushev fired the fatal shot. "We keep asking ourselves why, after eight months of work, basic facts are still 'probable' rather than proven," the family's statement says.

Some of what was said publicly doesn't match the original reports and autopsies, the relatives say. They also dispute a forensic finding about the two young victims which, they say, doesn't appear in any report or witness statement they've seen. They're also challenging what was said at the briefing about how long biological material can still be detected.

The family says the briefing claimed the victims had taken drugs, but the medical records show otherwise. They say they haven't been given the full toxicology report or the ballistics report. Swab samples, they point out, were taken in late February.

The relatives also ask why no gunshot residue was found on Ivaylo Kalushev's right hand. At the briefing, officials said he fired with both hands — but forensic experts say even then, at least trace particles should have been left on the lower hand. The family also wants to know why gunshot residue was found on Nikolay Zlatkov's hands, where the bullets came from that they say were found outside the camper van, and why three cartridge cases were still in the revolver's cylinder.

The relatives also ask about wipe marks on the outside of the camper van's door, and about a liquid that, according to a set of photos they were given, was found under the door and on the grass. They dispute what was said at the briefing about how far the crime-scene reconstruction report went, and whether it could have picked up outside traces or signs that other people were there.

In the psychological report on Kalushev, the family says there's a factual error about his time at the French-language school and whether it had a Spanish class.

In January, the girl had been traveling with Kalushev, Zlatkov and Aleksandar Makulev. Her relatives say neither her initial statement nor her father's mentioned any violence. The version made public later, they say, doesn't match those statements.

The family says it was wrong to make intimate forensic details about their son public, and asks whether doing so was lawful and necessary.

The bodies of the three were found in a camper van below Okolchitsa peak. The Sofia district prosecutor's office is leading the investigation. Officials say Ivaylo Kalushev shot Aleksandar Makulev and Nikolay Zlatkov, then shot himself. At the briefing, officials presented findings from forensic medicine, ballistics, psychology, psychiatry and other experts.

The relatives had stayed silent until now so prosecutors could work without pressure or media noise, Yani Makulev said. They changed course after the Sofia appellate prosecutor's briefing and the release of the expert findings.

Over claims made about the family's older son, the Makulevs say they will pursue their rights in court.