There is a Journalist in Europe.
He decided to try modern methods to solve the Jack the Ripper case.
He studied all materials available including all public records.
He found a man that walked through the area almost every early morning. He was standing over one victim when a stranger encountered him. He explained he had just happened on the body and was about to find a Policeman. The two went to find an officer. In retrospect the incident produced conflicting timelines and eyewitnesses.
It was later determined the man who found the body didn't exist.
But he turned up at a public meeting giving another name. Upon investigation it was determined he lived on one side of the crime area and worked as a butcher on the other. The murders stopped about the time the man moved away with his daughter and son in law. Although suspiciously similar murders occurred elsewhere. They were accounted as copycats. A study of the man's history and activities at the time of the murders revealed a personality in turmoil.
He lived to old age. A photograph exists of him from his elder years. Physical, circumstantial and forensic psychology evidence was then presented to several prosecutors around the world.
They all declared a Judge would no doubt take the case to trial. And they declared it would no doubt be the easiest conviction they all had undertaken.
My summation;
Sometimes the truth can stare You in the face and lie like a pro.
We may ponder why and how while the answer stands right beside us.
Just sayin'.