Hotch,
First, I want to apologize for leaving as quickly as I did. There are many things that I wish I could tell you, things that would help you to better understand. This is not what I had planned when I walked into your office that day.
I still remember that day like it was yesterday. I am still extremely grateful that you gave me the chance to pove myself. Working with you and the team has been an amazing part of my life and it does pain me to have to let it all go. I know that you are far from stupid, and that you will slowly try to put all the pieces together to figure out why I left. I only hope that you won't think so much that it starts to change your perception of me.
You are a great leader, and I know that we have had our issues, (especially when I started) but I am glad that we made it past that point, I respect you a great deal, you have been a mentor and a great friend. If our future is anything like our past then I have no doubt that our paths will cross again.
Sincerely,
Emily Prentiss