Chapter 9 examines social networks and their digital evidence content. Social media sites like Facebook and Twitter constitute the second (after cell phones) important driver of the new communication norm. These sites form the indispensable infrastructure for mass electronic communication, providing easy access to large audiences of electronic “friends” or “followers” through home computers and mobile devices. The myriad and continually changing ways to share information via social media has resulted in a digital goldmine of potential evidence in legal proceedings and, therefore, worthy of consideration.