The man accused of killing two Des Moines-area police officers will go on trial in Dubuque. A Polk County judge Wednesday moved Scott Michael Greene's trial out of Polk County to Dubuque County. The judge said the way Des Moines-area residents have gotten behind the families of slain officers is proof that Greene's trial needs to be moved. He's accused of killing Des Moines Police Sgt. Tony Beminio and Urbandale officer Justin Martin back in November.