Jury Finds Robert Zwick Is Guilty; Recommends Mercy CINCINNATI, O., April BAL verdict of guilty of first degree murder was returned by a jury of seven women and five men here today against Robert Zwick in con nection with the slaying in 1928 of Robert Andres, state fair witness in the killing of Marshal Peter Dum ele of North College bill. A recommendation of mercy was throten with the guilty verdict by the jury which had been deliberat ing the case since 10:30 o'clock at night. The jury's decision makes a sen tence of life imprisonment without hope of pardon mandatory. State's attorneys asserted during the prolonged trial that Zwick murdered Andres in an effort to save himself from identification as the killer of Marshal Dumele. Zwick denied any connection with either slaying, declaring he was all liquor runner and not a holdup man.