SIOUX CITY, Iowa (AP) – Authorities say a Whiting man tried to bribe his robbery victim into not testifying against him. Court documents say 21-year-old Justin Dahlheimer was accused of robbing a man he knew in January in Sioux City. Sioux City television station KCAU reports that documents say Dahlheimer was arrested May 15 after meeting the man and giving him $300 so the man wouldn’t testify. Dahlheimer remains charged with robbery and now faces a charge of tampering with a witness.