NEW : Police say first - degree murder charges are filed against year - old Michael James . Police identify the deceased detective as James Stevenson . `` His death is an incredible tragedy to not only his family , but to the entire city and to every man and woman who wears the police uniform . '' The officer was out celebrating his 38th birthday . He was hit with a piece of wood , they say .
NEW : Police say first - degree murder charges are filed against year - old Michael James . Police identify the deceased detective as James Stevenson . The officer was out celebrating his 38th birthday . He was hit with a piece of wood , they say .