This is case-in-point for centralized log-archival-and-analysis tools like SenSage. No matter how secure you make your infrastructure, in situations like this

This is case-in-point for centralized log-archival-and-analysis tools like SenSage. No matter how secure you make your infrastructure, in situations like this you want evidence of all activity on your networks, computers, DB's, app servers, apps, etc. Storing log data related to this activity can consume petabytes over a multi-year span. I don't know what kind of forensic tools Sony's using, hopefully they have something like SenSage.