This happened on February 20th this year. His name was Marcus W. and he was 31. His mother is desperately looking for answers, since she believes that her son was murdered.

https://www.youtube.com/watch?v=6nr2P5dzYTo&frags=pl%2Cwn

I couldn't find any english vids on this, so I translate the main parts and you can open up the translation box in yt yourself to get the main message. According to his mother, Marcus was a kindhearted being and due to his talent with numbers he was dealing with cryptocurrency and was about to make a world tour just before doing "something" in Berlin. He was also researching Pizzagate very intensely on the darknet and was allegedly about to report stuff to the authorities.

Few days before his death he checked in the Park Inn hotel in Berlin. Here is the footage that his mother has gained access to: https://www.youtube.com/watch?v=SYq0asyNsik&t=535s&frags=pl%2Cwn She explains that Marcus seems very nervous and has maybe witnessed something tragic. Around 3:30 you can see the Hotel Manager/Security talking to somebody and as times goes by, observing Marcus as if he was a suspect of something.

According to the police of Berlin Marcus jumped off from the hotel, flying 40 floors into his death. No shirt on and with one shoe. And he had no belongings with him they say, which I doubt. No third person involved they say.

Here is the mother: https://www.youtube.com/watch?v=PvDr0II3iIc&t=55s

The more she researches, the more the official version makes less sense.