By Tim Hardiman

On Oct. 1, 2011 more than 700 people were arrested and charged with disorderly conduct during an Occupy Wall Street march. One of those arrested was Malcom Harris, who used Twitter to share information about the events of that day. In early July, a New York judge ruled that Twitter must turn over Harris’s tweets in compliance with a request from the Manhattan District Attorney, who claims that the tweets will reveal the truth of what happened that day. What implications does this ruling have for law enforcement, prosecutors and defendants?