I've seen on more than one occasion the shows on TV that show the cop expert searching someone's computer for deleted emails. I've been told that even though you delete emails from your trash box they are still on your hard drive somewhere. How does one find them? If I delete an email by mistake it would be handy to find it again.

I have only tried using HELP on my computer, but that didn't tell me anything or else I didn't understand what it was telling me.

Can I get some help with this?