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			 A lawyer for the officer, William Porter, said he would seek an 
			appeals court injunction to block Porter from testifying against 
			Officer Caesar Goodson Jr. and Sergeant Alicia White. 
			 
			Baltimore City Circuit Court Judge Barry Williams said Porter, whose 
			own trial ended in a hung jury last month, could be compelled to 
			take the stand since state prosecutors had offered him immunity in 
			exchange for testifying. 
			 
			Williams said during a pre-trial hearing that Porter's "extremely 
			important testimony is needed in the Goodson and White cases." 
			 
			Goodson is the second of six officers scheduled to stand trial for 
			Gray's death in April and faces the most serious charge, 
			second-degree depraved-heart murder. The trial is set to begin on 
			Monday with jury selection. 
			
			  The 46-year-old officer, who like Gray is black, was the driver of 
			the van where Gray, who was arrested after fleeing police, sustained 
			the broken neck that killed him. 
			 
			The majority black city of 620,000 people exploded in arson and 
			rioting after Gray's funeral. The unrest followed other police 
			killings of black men in cities including New York and Ferguson, 
			Missouri. 
			 
			Porter's own trial on involuntary manslaughter and other charges 
			ended in a mistrial last month and a retrial is set for June. 
			 
			Williams issued his order after denying a defense motion to quash a 
			subpoena forcing Porter to testify. Porter took the stand to say 
			that he would invoke his constitutional right against 
			self-incrimination if called to testify. 
			 
			
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			Porter's lawyers said that if he is forced to testify, material 
			could emerge that could be used against him in retrial. 
			 
			Doug Colbert, a University of Maryland law professor, said of 
			Williams' decision, "This is a straightforward ruling. The 
			government has the power to compel testimony if they offer 
			immunity." 
			 
			Goodson faces up to 30 years in prison if convicted of the murder 
			charge. In Maryland, "depraved-heart" murder is a killing done while 
			acting with extreme disregard for human life. 
			 
			He also is accused of manslaughter, assault, misconduct in office 
			and reckless endangerment. 
			 
			Williams also denied a request from Goodson's lawyers to move the 
			trial out of the city due to the intense publicity surrounding the 
			case. 
			 
			(Writing by Ian Simpson; Editing by Scott Malone and James 
			Dalgleish) 
			
			[© 2016 Thomson Reuters. All rights 
			reserved.] 
			Copyright 2016 Reuters. All rights reserved. This material may not be published, 
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