A father and his 6-year-old son drowned Tuesday afternoon while sliding off a rock at Dicks Creek Falls in the Chattahoochee National Forest. The body of Joshua Kistler, 38, of Dahlonega, was found by emergency personnel shortly after rescue workers arrived, according to Lt. Chris Pfrogner of the Lumpkin County Sheriff’s Office. He said the body of Kistler’s son, Jaxon, was found later in the afternoon.