A body was found floating facedown in the San Diego River in Grantville on Tuesday, San Diego police said. San Diego police are investigating after a body was found floating facedown in the San Diego River in Grantville on Tuesday, according to the San Diego Police Department. The body was co nfirmed deceased after being reported at Mission Gorge Road and Alvarado Canyon Road around 1:10 p.m., said SDPD Officer Sarah Foster. Lifeguards were asked to help retrieve the body and authorities have been investigating for signs of trauma, police said. No other information was immediately available. ...read more read less