Forensic investigation can be defined as a field in criminology that deals with the gathering and analysis of all physical evidences related with a crime, so as to determine the facts and reach a conclusion on the victim and suspect. There are various techniques and software applications or programs used for obtaining and gathering data (informations) about a crime such as ProDiscover Forensic, CAINE, iLook, Sleuth Kit, identiKIT, etc.
identiKIT: it is used to make composite images of suspects based on the victim's description.
This ultimately implies that, a victim gives the description of how a suspect looks like to a police officer in order to make an image (pictorial illustration) of the individual.
With checks and balances, each of the three branches of government can limit the powers of the others. This way, no one branch becomes too powerful. Each branch “checks” the power of the other branches to make sure that the power is balanced between them.