Howard County police have charged a suspect with attempted murder in the shooting of his roommate Tuesday night in Columbia. The victim remains in critical condition with life-threatening injuries. 
 
Police arrested Zongping Zhang, 55, at his residence in the 8400 block of Oak Bush Terrace after they responded around 7:45 p.m. for a report that he shot his roommate. Inside the residence police located the victim, 49-year-old Matthew Ng, suffering from shotgun wounds. He was transported to University of Maryland Shock Trauma Center where he remains. 
 
Through investigation, police believe the shooting stemmed from an ongoing dispute over living conditions between the two roommates.   
 
Zhang is charged with attempted first- and second-degree murder, first-degree assault, and a weapon violation. He is being held without bond at the Howard County Detention Center. 
 
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