State plans to use 3 or 4 drugs to execute mass shooter Zane Michael Floyd
                                
                                
                                    (Newser) -
                                    Nevada prison officials disclosed Thursday that they want to use a never-before-tried combination of drugs for the state’s first lethal injection in 15 years, including the powerful opioid fentanyl, the sedative ketamine, and a heart-stopping salt, potassium chloride. Deputy federal public defenders representing convicted murderer Zane Michael Floyd promised...