A Franklin County judge Thursday sentenced one of three men convicted in the slaying of a Dublin gas-station attendant to life in prison.19-year-old Austin Cusey pleaded guilty last October in the death of 46-year-old Mohamed Hassan at the gas station on West Bridge Street in February of last year. Cusey, Jeffery Collins, and Eddie Murphy are charged with killing Hassan during a robbery. Cusey declined to testify against the other two defendants.