(Fridley, MN)  --  Anoka County investigators say the 15-year-old boy critically injured in a shooting in Fridley died in the hospital.  Officers say the boy was taken to Mercy Hospital Sunday night with a gunshot wound and had been in critical condition.  The victim has been identified as 15-year-old Anthony Rouse of Blaine.  Police arrested a 17-year-old boy in connection with the shooting.  The incident remains under investigation.