Police said family members found the body of In Ki Sung, 78, in the back yard of his home at 509 Killeen Road around 11:15 a.m.
On Thursday, police asked for the public's help in locating Sung, who had last been seen on Monday.
Officers said they were concerned for Sung, because he had asthma and did not have his inhaler with him. Sung spoke only Korean.
Details about the investigation into Sung's death were still emerging Sunday afternoon.