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			 Emergency responders racing to a crime scene without waiting for 
			orders might save lives by tending to the wounded, but during the 
			chaotic chase to catch the suspects a few days later, they also 
			risked being shot by police, the Harvard University report found. 
 			The hairiest events after the bombing, which killed three people and 
			injured 264, began three days later when the two ethnic Chechen 
			brothers accused of planting the pressure-cooker bombs at the finish 
			line, shot and killed a university police officer in a failed 
			attempt to steal his gun and flee the city. 
 			The shooting prompted hundreds of local police, as well as law 
			enforcement officials who had traveled from other towns to help with 
			the investigation, to race to Watertown, Massachusetts, where the 
			suspects traded shots with police. 			
			
			  
 			Officers surrounded the suspects, placing police at a high risk of 
			shooting one another, the report found. 
 			"They were incredibly lucky that there weren't a lot of friendly 
			fire casualties," said lead author Herman "Dutch" Leonard, a 
			professor of public management at Harvard's John F. Kennedy School 
			of Government. 
 			The study was based on interviews with some 100 law enforcement and 
			other public officials who took part in the response. 
 			One officer, Richard Donohue of the transit police, was badly 
			wounded in that gun battle and witnesses told local media that he 
			may have been accidentally shot by a fellow officer. No official 
			report on the shooting has been released. 
 			That incident was not the only case in which possibly overtired 
			officers ran the risk of shooting one another, the report said. The 
			gunbattle ended in the death of one suspect, 26-year-old Tamerlan 
			Tsarnaev, while his younger brother Dzhokhar, now 20, managed to 
			elude police. 
 			When the younger brother was found hiding in a drydocked boat the 
			next evening, dozens of police raced to the scene. 
 			One officer on a rooftop fired at Tsarnaev, prompting "a substantial 
			volume of contagious fire" by other police at the scene, the report 
			found. 
 			It noted that contagious gunfire, in which the sound of shots 
			prompts others to fire their weapons, poses a high risk in densely 
			populated areas such as the Watertown suburb of Boston where the 
			younger Tsarnaev was apprehended. 
 			
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			The suspect is now awaiting trial on charges that carry the threat 
			of execution if he is convicted. 
 			Despite problems during the manhunt, the report found that law 
			enforcement officials worked together smoothly on the day of the 
			bomb blasts, evidenced by the fact that most of the casualties, many 
			of whom lost legs, survived despite substantial loss of blood. 
 			That coordinated effort was a result of years of planning and 
			coordination around the marathon, Boston's best-attended sporting 
			event. 
 			The Harvard report suggests that law enforcement officials 
			responding to major security threats take more aggressive steps to 
			establish tactical command, including planning rest shifts so that 
			they are not relying on overtired officers. 
 			The lessons of the response to the Boston bombing could easily apply 
			to future security scares, Leonard said. 
 			"Any significant terrorist activity on the homeland is going to 
			generate a similar ramping up and presence of many different law 
			enforcement agencies," Leonard said. 
 			"This event illustrates how much progress we've made since 9/11 and 
			Katrina in being able to form rapid command structures that are 
			effective," he said. "But we have a lot of work to do in projecting 
			the same philosophy down to operating on the street." 			
			
			  
 			(Reporting by Scott Malone; editing by Gunna Dickson) 
			[© 2014 Thomson Reuters. All rights 
				reserved.] Copyright 2014 Reuters. All rights reserved. This material may not be published, 
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