The Fourth Amendment gives every U.S. citizen the right to privacy. The government can only invade your home, search your person - or monitor your emails or Internet activity - in certain circumstances. Unless stringent requirements are met, any unwarranted invasion of privacy by police departments or federal agents is unconstitutional and illegal.
A 31-year-old Maryland man was sentenced to 40 years in federal prison, plus lifetime supervised release, after he pleaded guilty to producing child pornography. The man was arrested in January 2013 after an investigation involving local and federal agencies.