Descendant of one of Victims of Jack the Ripper has called for a new investigation into one of history’s most notorious serial killers, after DNA evidence showed the killer was a Polish barber.

The true identity of Jack the Ripper, whose gruesome murders terrorized the grim slums of Whitechapel, East London in 1888, has been a mystery ever since.

There were dozens of suspects, from members of the royal family and prime ministers to bootleggers.

After extracting DNA from scarves recovered from the scene of one of the murders, Jack the Ripper detective Russell Edwards claimed in 2014 that the killer Aaron Kosminskiemigrant from Poland, who worked as a barber.

The story goes that the scarf came from the scene of the murder of the Ripper’s fourth victim, Catherine Eddowes, on September 30, 1888.

At Edwards’ request, Dr Jari Louhelainen, a senior lecturer at Liverpool John Moores University, isolated seven small segments of DNA from blood stains on the scarf.

They were compared to the DNA of Karen Miller, a direct descendant of Eddowes, confirming that her blood was in the joke.

“On testing, the first result showed a 99.2% match. Since DNA has two complementary strands, we went ahead and tested the second DNA strand, which showed a perfect 100% match,” Louhelainen told Liverpool Echo newspaper.

DNA from the semen stains on the clothing was matched to a descendant of Kosminski.

Edwards demanded an investigation into the unsolved murder, saying DNA evidence warranted it.

Miller seconded the call interview with the Daily Mail published on Monday.

“The name Jack the Ripper became sensational. He went down in history as this famous character,” she told the newspaper. “People forgot about the victims, who didn’t get justice at the time. Now we need this investigation to legally name the killer.”

Miller added: “The legal appointment of an actual person in court who can consider all the evidence would be a form of justice for the victims.”

The investigation was also supported by Kosminski’s descendants, writes the Daily Mail. According to the paper, Kosminski’s great-great-great-niece Amanda Poulos said, “I’m more than happy to finally find out what really happened.”

Some have cast doubt on Edwards’ findings.

The research was not published in a peer-reviewed scientific journal, meaning the claims cannot be independently verified or the methodology scrutinized.

By law, it is up to the attorney general to authorize further investigation.

Two years ago, then-Attorney General Michael Ellis denied the request, saying there was insufficient new evidence.

Miller said Monday that the time was right to reopen the case.

“It would mean a lot to me, my family, and many others if this crime was finally solved,” she added.

Kosminski was born in Klodawa in central Poland on September 11, 1865.

His family fled Imperial Russian anti-Jewish pogroms and immigrated to East London in the early 1880s. He lived near the scene of the murder.

Some reports say he was taken into custody by the police to be identified by a witness who saw him with one of the victims.

Although a positive identification was made, the witness refused to give incriminating statements, which means that the police had no choice but to let Kosminski go.

He entered the workhouse in 1889, where he was described on admission as “poor”. He was released later that year, but soon ended up in a mental hospital.

He died of gangrene in hospital on 24 March 1919 and was buried three days later at East Ham Cemetery in East London.

As CBS News previously reportedformer FBI agent John Douglas called the murders “murders of lust,” meaning that the killer attacked his victims’ genital areas. In Douglas’s view, it was a way to act out his fantasy of female domination, cruelty, and mutilation.