There are several reasons to employ the techniques of computer forensics:
•    In legal cases, computer forensic techniques are frequently used to analyze computer systems belonging to defendants (in criminal cases) or litigants (in civil cases).
•    To recover data in the event of a hardware or software failure.
•    To analyze a computer system after a break-in, for example, to determine how the attacker gained access and what the attacker did.
•    To gather evidence against an employee that an organization wishes to terminate.
•    To gain information about how computer systems work for the purpose of debugging, performance optimization, or reverse-engineering.

Most people think about computer forensics as being used by large corporations to search and recover data or to sleuth and find malicious intent.  However, the use of computer forensics is much broader and can be used in cases such as divorce, child custody, harassment and many others.  The need to recover lost data or that of rebuilding information can be done by quality, trained computer forensic practitioners.  It’s advised that you do your homework, study a little about what’s involved and the process.  That way when you seek out qualified individuals you will have a better understanding of their knowledge base.  Something to consider when choosing a computer forensic specialist is their ability to be credible on the witness stand.