U.S. law enforcement agencies are a long way from being able to effectively track threats of the kind a gunman posted on Instagram before his execution-style murder of two New York City policemen last weekend.
The U.S. Supreme Court appeared conflicted on Monday over whether to uphold the conviction of a Pennsylvania man found guilty of making threatening statements to his estranged wife, law enforcement officers and others on social media.
40-year-old Jofi Joseph, a senior White House official who had been part of the National Security Council nuclear non-proliferation team, was fired last week after it was revealed he was the man who posted derogatory comments on a Twitter account under a fake name for more than two years