The Sacramento County Sheriff's Department is asking the public's help in finding a 47-year-old man and his 9-year-old nephew who were last seen on Wednesday. The last sighting of Robert Duran Bencomo, and his nephew, Alek Zawkiewicz, was 10 a.m. Wednesday as they left Zawkiewicz's home in the 3300 block of Fiddletown Court in Sacramento, according to a Sheriff's Department news release. The two were leaving for a planned canoeing trip and were supposed to have returned that night, the release states.