Wow... a lot of ignorance.
Just because the file was on his home system doesn't mean he was actively using it.
Show of hand all you developers...
How many of you have taken any of your work coding home so you can...
...reference from it in the future?
...keep a copy of 'your' work to show prospective employers?
...collect work you're especially proud of?
Yep, about what I thought, 100%
Just because someone works for the government, doesn't mean they're intelligent. Just Google, Hillary Clinton.