IEET Fellow Mike Treder is missing

No one has heard from him for two days? Do police even investigate missing adults before a week has passed? The story may be missing crucial elements, but I don't think it's unusual for a grown man not to call his family for two days.

Also, what's a transhumanist and why is that relevant?

Check the local hospitals? This post currently says nothing about checking hospitals which is the most likely place "missing" people turn up.