Show ExPoliceman Charged With Grave f Crime Chicago Vincent A Altman former I for-mer policeman and assistant business agent for the Carpenters union was held to the grand jury on Thursday by Judge McSurely on a charge of hav 1 ing thrown bomb 311 that wrecked the Central Exchange ot the Chicago Telephone company a few days ago His ball was fixed at 20000 Joseph Altman a bather brother of the man held to t thq < 2 Brand Jury Is also under arrest on suspicion of being Implicated I Implicat-ed In bomb outrages In various sections sec-tions of the city during the last two years t |