Types of investigations in which Computer Forensics may play a pivotal role...

decryption
password recovery
theft of intellectual property
tracking harassing
destruction of/misappropriation of data
alteration of data, alteration/misuse of programs
use of unlicensed software
illegal duplication of software
unauthorized access to a computer system
unauthorized use of company computer for private gain
unofficial access to confidential data
downloading/distribution of pornographic material
e-mail misuse
terrorism
blackmail
money laundering
murder
rape
pedophilia
insurance fraud
data recovery