Help with outlook express

To make a long story short I use outlook express. I changed email addresses so quit using this particualr email address I had for about 5 years. So what I believe I did was set up a new identity in outlook express and deleted the other email address out. Now I find myself needing to go to court and there are so communication that took place under the old email address and I am not sure how to get back to the other outlook express so retrieve these emails since I deleted that identity. HELP. Thanks in advance.

Kim