witness protection program
noun
                                                                                
                                                            witness protection pro·gram
                    
                                                        
            
                                
              
          
                                                      : a state or federal program designed to protect prosecution witnesses in serious criminal cases especially from bodily injury or tampering (as by providing aid in establishing a new identity in a new location)                                      
                
                    
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  Merriam-Webster unabridged




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