How odd is it that a stranger, an old man at that, that randomly appears in the park just happens to move in close to you 4 years later?
We're missing the bigger picture here. That man was a pedofile who decided to start fresh and the day he decided, O P, pissed in a sink. He decided that O P would be his final target. But would kill him so nobody knew.

Open and shut case. No need to thank me. But a card would be nice.