Law.com - Twitter Jitters: Can What You Tweet About Police Land You in Jail?:
"In a statement, Pittsburgh police explained that Madison 'used legal devices for illegal acts.' What exactly those illegal acts were, however, remains unclear. What is clear is that Madison's arrest for sharing information with other protesters online presents broader public policy concerns. Broader because it matters not what medium or Twitter-like technology you use to convey a controversial message. What matters -- and what Madison's arrest here potentially threatens -- is the underlying right to say it. "