Praying behind someone who works in a riba-based bank
Question

                Can we pray behind a person who is an employee of a bank which deals in riba.
Praise be to Allah.The Standing Committee was asked a similar 
          question, and they replied:  
Working in a riba-based bank is haraam, and 
          the one who does that is disobeying Allaah, but prayer offered behind 
          him is still valid, because he is a Muslim. His prayer itself is valid, 
          if he meets all the conditions and does all that Allaah has prescribed 
          in the prayer, according to the more correct of the two scholarly opinions. 
          If you can manange to pray behind someone else who is righteous and 
          pious, then that is better. And Allaah knows best.