I know someone who was heavily abused by a middle school teacher.

Later in life they found out that the guy was leaving in a retirement home with early onset dementia.

He went to visit pretending to be a favorite student but was actually killing the guy over the course of a week or two with some poison make sure that he made up in his kitchen.

Anyway he told us this one night while out camping we all remember how bad the guy was treated but man it's heavy on my conscience ever since I just don't know what to do with information.

Crazy thing is the dude stared into the fire the entire time without breaking to look away as he told us the entire story.