On 2/5/2015 SWGDE released a new draft document for public comment; "Best Practices for the Recovery of Data from CCTV Digital Video Recorders".
"The purpose of this document is to provide advanced practices for data recovery from CCTV DVRs when the data cannot be recovered via the guidelines provided in the SWGIT Best Practices for the Analysis of Digital Video Recorders."
Visit www.swgde.org for further details.