Question: What's on the headstone Derek bought in Chicago?
Answer: "The Lost Children—You Are All Loved And Missed"
When he was just a kid, Derek found the body of a young boy in a vacant lot. He raised enough money to bury the victim and buy a headstone, but because no one claimed the body, it remained nameless. When he returned to Chicago and another local boy was murdered, Derek finally engraved the headstone with a powerful message: That all young lives matter.
"Profiler, Profiled" (Season 2, Episode 12)