The Justice Department released a presentation entitled "Obtaining and Using Evidence from Social Networking Sites." The slides, which were prepared by two lawyers from the agency's Computer Crime and Intellectual Property Section, detail several social media companies' data retention practices and responses to law enforcement requests. The presentation notes that Facebook was “often cooperative with emergency requests” while complaining about Twitter’s short data retention policies and refusal to preserve data without legal process. The presentation also touches on use of social media for undercover operations
United States Justice Dept: "Obtaining and Using Evidence from Social Networking Sites"
EFF Posts Documents Detailing Law Enforcement Collection of Data From Social Media Sites Electronic Frontier Foundation