who is the second commissioner mentioned here?
An American public servant and New York City Police Commissioner.
John G. Bergen
John G. Bergen (December 4, 1814 – July 18, 1867) was an American public servant and New York City Police Commissioner. 
new york draft riots during the civil war It is referred to as the Manhattan draft riots. how many days did these riots go on for? 4 what was the reason behind the riots? White working-class discontent with new laws passed by Congress that year to draft men to fight in the ongoing American Civil War. which police department was called on to control the riot? New York Metropolitan Police Department what did they do? New York Metropolitan Police Department under the command of Superintendent John A. Kennedy. Commissioners Thomas Coxon Acton and John G. Bergen took command when Kennedy was seriously injured by a mob during the early stages of the riots.
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John G. Bergen [SEP] Introduction
John G. Bergen (December 4, 1814 – July 18, 1867) was an American public servant and New York City Police Commissioner. A member and treasurer of the Board of Police Commissioners, he and Thomas Coxon Acton assumed command of the NYPD during the New York Draft Riots after Superintendent John Kennedy was injured at the hands of a mob.