Modern crime often leaves an electronic trail. Finding and preserving that evidence requires careful methods as well as technical skill
Law
enforcement can rarely get through a case these days without having to
examine some kind of technology. Computers may not be used to commit a
particular crime, but they might contain evidence. Similarly, cell
phones and other data devices need to be examined regularly. This has
led to the development of the field of digital forensics, which examines
how equipment has to be handled to ensure that it hasn’t been altered
once it has been taken for evidence, how to copy material reliably, and
how to maintain equipment that can sometimes erase itself if left
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