Show IMPORTANT WITNESS GONE SAN SAK feancisco S GRAND JURY JUBY investigation lr I ex secretary hall of the police commission makes rove revelations lations and thou then disappears sall sail I 1 francisco feb 16 tho the gra grand n d jury Is unable to find william hall ex secretary of 0 tile the board of police commissioners ners foreman gagan states that in a 0 pi avate interview A fall made startling revelations of the methods alleged to have been employed by some police oni clala in blackmailing anil and the then n protecting gamblers and other disreputable character gagan says say that hall agreed to appear end testify to these statements before the grand lury jury upon the condition that he be should have immunity front prosecution to tills this foreman gagan assented but hall has bluer disappeared he owns valuable real estate property pio perty |