A deadly officer-involved shooting is under investigation in Arlington. Police responded to a home last evening after a man allegedly attacked someone with a baseball bat. The suspect barricaded himself inside for over an hour before walking out onto the porch. That's when authorities say he pulled out a weapon sparking officers to fire at him. The weapon was later found to be a B-B gun that looked like a handgun. The Tarrant County Medical Examiner identified him as 31-year-old Nicholas Walker.
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