deleted colleagues file

I deleted work report of my colleague as i wanted to take revenge. Haha....he was to make the presentation in front of boss and copied my data. I worked so hard to collect all the data and he simply wanted to take credit all alone. 

I was even smarter to delete the file from the computer and also misplaced his pen drieve. Poor he..........he was left with no choice and got a good scolding.............i think he knew i did it but he only started it and now have to pay the price.........