Tehr smiled.  Unsure that this plan would even work.  He had never tried to use this on a living person, only objects.  It also had a very limited range, if the thief was outside of five hundred feet or so the spell would fail.  Prepared for failure, Tehr held tightly the single hair he found and cast locate object, thinking about nothing other than the man who the hair may have belonged too.  Emptying his mind of all other thoughts.