I fired an employee who fried a computer. Can i withhold cost to repair computer from her last check?

I had to fire an employee for repeadetly breaking company policy. She recieved written warnings and a chance to keep her job. The straw that broke the camels back was that she was using internet for unauthorized tasks and in turn fried the coimputer she was working on. then lied about what websited she was on. It has since been fixed and i was able to find out what website caused the virus. Can i withhold the cost to repair computer from her final paycheck?