DNA analysis helped identify Jack the Ripper

Progress does not stand still and now with the help of modern technologies it is possible to solve high-profile crimes committed more than a hundred years ago. For example, the Finnish amateur detective and part-time molecular biologist Jari Louhelainen claims that through DNA analysis he identified Jack the Ripper, who killed at least five prostitutes in the autumn of 1888 in London's East End.

According to the scientist, the killer was the Polish immigrant Aaron Kosminski. At the time of the murders, he was living in the East End, and he was 23 years old. He arrived in England with his family in 1881, hiding from the persecution of the Russian authorities. After the murders, he was placed in a psychiatric hospital, where he died from complications caused by gangrene.

The biologist said he used a "vacuuming" technique to extract DNA from the shawl of one of the victims, Catherine Eddowes. The businessman Russell Edwards bought it at an auction and asked Louhelainen to find any evidence related to the Ripper case.

Research on the shawl revealed several DNA samples, one of which undoubtedly belonged to the victim and one to the killer. After examining the samples, the scientist suggested that he could be a Jew of Russian origin with dark hair. More detailed studies have shown a complete match with Kosminski's DNA.

Despite all the conclusions, many scientists reacted with doubt to this news, arguing that for so long anyone could have left their DNA on evidence. But the fact that during the investigation Kosminski was one of the main suspects in this case remains undeniable. However, he was released due to lack of evidence.