Most people who go missing turn up safe and well, within a few hours or days. Some, unfortunately, are found dead. When people do leave, the reason is often obvious, too—because they are running away from something (debt or the police, for example) or to something (a new partner or a fresh start).
It is very rare for people to disappear entirely completely and forever, but occasionally, even prominent figures seem to vanish without a trace for no reason at all. Here, we look at some very cold cases indeed.