Super creepy papers found on public train in Germany - TW: potential grooming

A few months ago I found this really creepy package including 3 papers that someone intentionally left behind on a public train. To me it clearly looks like someone is grooming/ fishing for young and minor girls to have sex with them. The papers did include full name, mobile number and e-mail address to contact the person. To me it seemed like this wasn’t the first time this person did this. I brought it to the police station the day after I found it, hoping they would investigate. The police never got back to me and when I contacted them to ask about the investigation they said they can’t give me any information. If you require translation let me know!