A transgender teenager accused of opening fire with a friend in a Denver-area charter school in May to exact revenge on classmates who bullied him pleaded guilty on Friday to murder and attempted murder charges, prosecutors said. Alec McKinney, 16, who has been held without bond since the May 7 rampage that left one student dead and eight others wounded, pleaded guilty to 17 criminal counts, including conspiracy and weapons charges, said Douglas County District Attorney George Brauchler. McKinney is accused along with Devon Erickson, 19, of carrying out the shooting at the Science, Technology, Engineering and Math (STEM) School in Highlands Ranch, Colorado.
