Show War Department Begins Probe WASHINGTON Sept 8 United Press The Press The war department today officially began an Investigation of the the charges of at incompetence and criminal negligence made by Colonel Colonel Colonel Col Col- onel William l Mitchell former as- as as assistant assistant chief of the air service against the war ar and navy departments depart depart- ments Major General John L. L Hines chief of staff instructed Major General Eli Ell A. A Helmick Inspector general of Df the army to obtain from Mitchell confirmation or denial of his printed statement I General Helmick following the investigation wl will wil 1 make recommendations recommendations j to Acting Secretary Davis Davis Davis Da Da- Da- Da vis on action to be taken against Mitchell Though department officials de declined declined do- do dined to comment on the case to today today to- to day It is understood that court martial trial of at Mitchell 1 on charges of ot insubordination is inevitable |