Given name: Unknown Family name: Krupnik
- YES
 - Male
 - Krupnik
 - 
                                        
                                        
worked in the Pawiak prison as a plumber, knew the sewers. On 2 April 1944 escaped from the Pawiak prison with his friend after having deceived two guards.
 - workers
 
- 
    
    
    
            
Related sources:
 
- 17,18