Units would be dispatched to roadblock the surroundings, one at each intersection and one at each alleyway entry/exit point. After the majority of the crowds have evacuated a clear directive would be made to officers, "No one gets in or out of hot zone until they've been questioned." A command station would be set up in front of the bank. The sniper would be placed on the tallest building in the area, the three-story building across from the bank. He would be given the directive to shoot suspect on sight, as Don Coker says in his "Banking Security Principles and Issues" regarding the predilections of bank robbers, "Regardless of what anyone anywhere states, no criminal wants to get shot…" (Coker, 2010). Of course this is a rather serious directive, but assuming he is armed with the intent to hurt or injury innocents, a shoot to kill directive is not extreme.

I would imagine that seeing the SWAT team pursue him in full tactical regalia he would surrender peacefully, if not, he would end up like Osama Bin Laden. Either way, no civilian gets injured, no officer gets injured and the potential threat is eliminated.
Works Cited

Coker, D (2010). Bank Security Principles and Issues. HG Experts Legal Experts

Directory. Retrieved from http://www.hgexperts.com/

Seibert, P (2011). SafeCatch: An Educational Partnership Offering More Customer

Development and Less Crime. The Police Chief. Retrieved from http://www.policechiefmagazine.org.