A local store manager drown Sunday afternoon while swimming near the Twin Falls area of Rock Island State Park.The body of the victim, Danny Herrin, 35, manager of the local Goodwill Store, was found by recovery crews around 6:30 p.m. Sunday, hours after he went missing while swimming in the Barren Fork River at Rock Island.According to White County investigator Chris Isom, the drowning happened while Herrin was swimming with friends near Twin Falls, located near the end of Power House Road on the White County side of the river.“He was there swimming with family and had gone out about 10 or 15 feet when he went under and didn’t come back up,” Isom said, noting there were several witnesses to the incident. “There were several people who went to try to help him but they were unable to find him.”Herrin went missing around 2 p.m. Park rangers and rescue squad members searched the area around where Herrin disappeared until he was found just over four hours later. Isom said Herrin’s body was sent for autopsy so it is not known what may have caused him to go under and disappear so quickly.