As coroner, he established the county's first "chemical laboratory", and appointed experienced pathologists and chemists.[12] He was aggressive at prosecuting certain types of homicide, centering his political image on fighting to guard the innocent.[12] Hoffman would even resort to stacking inquestjuries in order to increase the likelihood of particular suspects being charged with homicide.[12]
In the aftermath of the Eastland disaster, Hoffman convened a jury within hours to help to determine accountability for the deaths.[13] He also secured the Second Regiment Armory to use a central morgue for the victims of the disaster.[13]
He resigned the office of Cook County coroner in 1922 to assume the position of Cook County sheriff.[14]
Cook County Sheriff
In 1922, Hoffman was elected Cook County sheriff, having run on a "reform" platform.[6] He pledged to "clean up" the administration of the Cook County Jail.[6]
Hoffman retained Wesley Westbrook as the warden of Cook County Jail. Westbrook had been hired by his predecessor, Charles W. Peters.[6]
A major scandal arose when it came out that Hoffman had been giving special privileged to Valley GangprohibitiongangstersTerry Druggan and Frankie Lake while they were prisoners at Cook County Jail.[2][6] Relating to this, Hoffman and his jail warden, Westbrook, were charged with contempt of court by James H. Wilkerson, and Hoffman spent 30 days in jail and was fined $2,500 while Westbrook spent four months in jail.[2][15] After several appeals attempts failed, Hoffman spent prison time while in office as Sheriff.[2]
In 1925, after the scandal involving the favoritism to mobsters in the Cook County Jail had already broke, Hoffman appointed George H. Weideling as the new warden of the jail. Weideling would resign after eight months after Judge John P. McGoorty, in his investigation of the jail's conditions, opined that, despite Weideling being honest, there was a "deplorable lack of morale and a breakdown of discipline in the institution".[16]
Hoffman remained in office after his term would have normally expired in early December 1926 due to the fact that his elected successor, Patrick J. Carr, died before he could take office (the law stated that a sheriff served until his successor qualified to take office). Hoffman would resign in late December 1926, effective on December 26.[17]