State Police responded to a call of a body located in the Charles River this afternoon.Authorities responded to the area of 47 David G. Mugar Way at the Hatch Memorial Shell around 12:32 p.m. where they recovered an adult male's body.State Police and the Suffolk County District Attorney's office confirmed that the victim is “possibly a member of the homeless community” but is not the body of missing 22-year-old Zachary Marr, who was last seen Feb.