FBI declined to answer questions about whether this breach resulted from the compromise of data from some kind of law enforcement portal. Their statement:

"Shortly after identifying a potential breach to customer data and before making its materiality decision, AT&T contacted the FBI to report the incident. In assessing the nature of the breach, all parties discussed a potential delay to public reporting under Item 1.05(c) of the SEC Rule, due to potential risks to national security and/or public safety. AT&T, FBI, and DOJ worked collaboratively through the first and second delay process, all while sharing key threat intelligence to bolster FBI investigative equities and to assist AT&T’s incident response work. The FBI prioritizes assistance to victims of cyber-attacks, encourages organizations to establish a relationship with their local FBI field office in advance of a cyber incident, and to contact the FBI early in the event of breach."