In this paper, we present a review and comparative evaluation of forensics guidelines of NIST SP 800-101 Rev.1:2014 and ISO/IEC 27037:2012. This study proposes and analyzes an integrated implementation of these two forensic guidelines. The result of this will provide a forensic investigator with a good understanding of the two forensic standards, and present an opportunity to forensic investigators, organizations and jurisdictions that are compliant in one standard to realize the benefits of the other standard. As it is shown, no single standard addresses all processes of digital forensic investigations. This comparison identifies areas of forensics guidelines covered by each standard, commonalities and differences in the two standards, and their limitations.