In computer forensic investigation there are varying modes to committing a crime. New technology will create new crimes that we have never before imagined.
The computer could be the object of the crime, such as if it were to be stolen or destroyed.
The computer could be the subject of a crime, such as if it had contained a malicious software that would collect the users details which could be used for fraud.
The computer could be the tool of the crime, where the act of a crime is performed through the use of a computer like forging documents, or gaining access to another computer through a network.
The computer could also be the symbol of a crime such as a hoax to frighten individuals; even if the computer does not exist.
Digital Evidence and Computer Crime – Forensic Science, Computers and the Internet – Eoghan Casey