A 12-year-old boy who was arrested after fatally shooting someone near 51st and Hadley on Saturday will not face criminal charges.The Milwaukee County district attorney told TMJ4 on Thursday that the child acted in defense of his mother when he shot a 32-year-old on Dec. 14.They later died in the hospital.RELATED:-Read our previous coverage of this storyPolice had said the shooting stemmed from an argument.The district attorney said the decision not to file charges is final.Its about time to watch on your time. Stream local news and weather 24/7 by searching for TMJ4 on your device.Available for download on Roku, Apple TV, Amazon Fire TV, and more.Report a typo or error // Submit a news tip