Uhh, why can't they just take the hard drive and let the company make an image of it so that they can continue to operate their business???? Other than being heavy handed there really isn't a reason to seize a case, motherboard, processor, memory, dvd drive, etc..... if all they are looking for is the data stored on the HD.
Or are they no longer afforded the position of being innocent until proven guilty of something????
You can learn a lot more from a hard drive than what's in the current set of files. There are ways of getting to the deleted stuff, even if it's been over-written.
All of those are why anyone with a lick of sense in IT has multiple, off-site backups of their images and business critical data. It may be expensive, but the one time you need it, it’s priceless.