Don't fire him. Thank him.
When he lied on his application, he lied to a faceless company. If you want
to personalise it, he lied to the secretary he gave it to. When he admitted
it to you he told a truth to a 'friend'/colleague with whom he felt a mutual
trust developing, don't abuse this.
He should be congratulated on his initiative in getting the job, his ability
to do the job he has been hired for. Don't underestimate this confession as
a drunken spillage of the proverbial beans, he thought about admitting this
to you for some time (in just the same way that you stealing clothes played
on your mind enough for it to remain in your memory only for it to be
regurgitated as a sinful incident from your past) and its to his credit that
he finally did. He obviously respects you enough to be able to share this
with you and if this is no reflection on his ability to work in the role you
have for him (any more than stealing expensive clothes is a reflection on
your ability to suit the professional role you are in) then let it go and
enjoy the level of honesty that you've now aqcuired between yourselves. He
has grown up, its in the past, and he's doing his job to your satisfaction.

"Geo" wrote in message
ups.com...

wrote:

Fire him. First, because he lied to the very person that hired him
(you). Second, to not would be a disservice to those that do work for
you that earned degrees the proper way.