MIAMI — More than four years after he gunned down 17 people at a Parkland high school, Nikolas Cruz is finally set to face judgment in a Broward County courtroom. On Monday, barring any unexpected delays, prosecutors and defense attorneys will begin the process of selecting 12 jurors to decide one remaining question about the confessed and convicted mass murderer. Should he live or die? Under Florida law, a decision to execute Cruz will have to be a unanimous one. Finding a dozen people to make it— plus alternates — is expected to take weeks. Given the immense publicity, the brutal details of …