Okay, thank you so much for the help. We were able to locate the key on the computer!

Now comes the second part of the issue. The password is not working. The password was used on Friday to send a test transaction to himself.
I have a picture of the wallet password sent via WhatsApp (from him to me) and it written down.

But he can't send any bitcoin at all from it even though the correct amount is now showing.

As of note:  When he entered the password he put as an example

horse123
hosre123

and sent that as a picture.  However, he must have re-typed it so it would go thru, or bitcoin-qt didn't flag it.  He did send a transaction
after that password so now we are lost.  Is it possible the password got corrupted or something?