Need to find out what's on your kids computer? Need to recover data on an 'accidental' delete? You need a computer forensic company to help. These guys can find whatever you need/want on any old hard drive.
Of course you may need to ask the computer forensics people if it is actually legal for you to be snooping on that computer (if it isn't strictly yours) and they (while not being legally bound) can offer you sound advice on how to proceed. They can also teach you how to secure your computer and ensure the utmost in privacy (except from other computer forensics possibly).
Basically these guys can do whatever it is you need to do to or with data. Whether finding deleted data, or retrieving 'hidden' data that you don't know is there. Each of their examiners holds multiple certifications including the Certified Forensic Computer Examiner .
If you are looking for a professional, easy-to-use and reasonably priced experts to help you with your computer data needs, shop around and then call the best.