My father's school did a guided tour through the woods searching and learning about local herbs.
A few years later, my father was still a child, police showed up and asked him if he recognised the man in a picture that they showed him. My father explained that he was the herbalist tour guide.
Apparently, the guy had murdered several boys and had my father's name and address in his car.
The police had caught the guy by this point. I think he killed himself or died in suspicious circumstances...