This case is regarded as a shame by the German police. They have been chasing the mysterious female killer for 16 years. What is the result?

The slightest mistake makes a thousand miles." The police cannot miss any clues when handling a case. Any small mistake will affect the handling of the case. Germany is famous for its meticulousness, and the legend of "German conscience sewer" is still circulated in China. . However, the German police spent 16 years tracking down a female killer who committed many major crimes, and found her DNA every time, but no one was caught every time. In the end, the police discovered that they had committed the crime from beginning to end. A mistake, do you know what this mistake is?

On May 26, 1993, a 62-year-old woman was strangled with a metal wire and killed at home. The German police believed it was a murder. Murder, but nothing suspicious was found, except for a female DNA that did not belong to the old lady found on the cup. The police found that this DNA was not in the German DNA database, and concluded that the murderer of the old lady was a foreign woman because they did not know her. Because of her appearance, she was called the "Faceless Killer".

The "Faceless Killer" was so cunning that the police searched for her for 8 years but could not find her. Moreover, in March 2001, she committed another crime. This time the deceased was a 61-year-old antique owner. Less than half a year later, in October, the "faceless killer" killed a third person. The police found her DNA on a bloody syringe, and speculated that she was still a person. Drug addict.

Based on the information they had, combined with DNA, the police deduced her appearance, drew her, and offered a reward of 300,000 euros for her capture. The "Faceless Killer" didn't take them seriously at all, and even killed an anti-drug policeman in 2007. The German police were so angry that they directly raised the reward from 300,000 to 7 million euros. /p>

From the first case in 1993 to 2007, the "faceless killer" killed at least four people, as well as more than a dozen thefts, a major fire, and multiple murders at the same time. The police also find it strange why the "Faceless Killer" is so arrogant and commits so many high-profile crimes without being caught. How can he commit crimes in multiple countries at the same time?

In 2009? , a man who had been confirmed to have committed suicide, the police still found the DNA of the "faceless killer" on him. This time the police began to wonder if there was something wrong with the swabs they used to collect the DNA. The results of the swab investigation shocked the German police. No, the problem did lie with the cotton swab.

The cotton swab used by the German police came from the Austrian cotton swab factory Greiner Bio-One. A female worker did not strictly follow the rules and left her DNA on the cotton swab. The cotton swabs she made were sold all over the world, and naturally some of them reached the German police, which affected their investigation of the case. After the truth came out, the German police learned that the "faceless killer" who had spent 16 years tracking down was actually a cotton swab. The citizens blamed themselves and felt that they themselves had been humiliated.

“Every time you learn a lesson, you will gain wisdom.” The German police have learned this painful lesson and will strictly control future police equipment. Germany has always been a rigorous and serious country in our minds, but this time it was neglected and made a big joke. Moreover, the real perpetrators of some murders and thefts more than ten years ago have long been at large because of cotton swabs, causing countless losses. We should also use the German police incident as a negative lesson to remind ourselves not to ignore details when doing things.