Show MINE GUARDS CONVICTED court finds no excuse for slayer of striking miners houghton alach the four defendants in ia the See berville murder case convicted of manslaughter for the killing of steve a copper miner were sentenced to indeterminate terms in marquette prison james cooper arthur davis and william groff guards employed by the waddell mahon agency must serve berve a minimum of seven years a maximum of fifteen with a becom mended maximum of fifteen edwin Poling horne a deputy sheriff subject to the tho same oame maximum and minimum received a recommended minimum ot of twelve years because the jury suggested clemency in his case |