You are working in a computer forensic lab. A law enforcement investigator brings you a computer and a valid search warrant. You have legal authority to search the computer. The investigator hands you a piece of paper that has three printed checks on it. All three checks have the same check and account number.
You image the suspect's computer and open the evidence file with EnCase. You perform a text search for the account number and check number. Nothing returns on the search results. You perform a text search for all other information found on the printed checks and there is still nothing returned in the search results.
You run a signature analysis and check the gallery. You cannot locate any graphical copies of the printed checks in the gallery. At this point, is it safe to say that the checks are not located on the suspect computer?