You see I sort of have an issue with a former employee who is still listed as working for me on his facebook profile. I would like to know if it is possible for me to remove that tag from his profile. Contacting him and asking nicely is not an option.
If contacting him and asking nicely (or by force) is not an option, you can't remove that tag by any legal means.
If you could, it would mean a violation of his privacy and a free choice. Even if its a lie, he did not anyhow violate (willingly or unwillingly) any ToS rules, simply because there is not such a rule stating that any information on the internet can't be a lie.