Computer-based evidence is very different from paper-based evidence-it has unique characteristics that make it critical to preserve the computer-based evidence as quickly as possible; discussions regarding relevance and privilege can occur once the evidence has been preserved.

JLI therefore offers evidence preservation and analysis services. Using special backup software, entire "image" backups are made of computer hard disks and floppy diskettes. These are then analysed for active files, deleted files and fragments of long since deleted documents.

JLI's additional analyses include the creation of indexes and/or concordances of all recovered information permitting on-line searching of the recovered information.