Superintendent Michael Crowley holding new and old type of gun at police headquarters

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Superintedent Michael H. Crowley of the Boston Police
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Heads of the Boston Police including Superintedent Michael H. Crowley.
Superintendent Crowley and Commissioner Long.
Capt. Albert Chapman (L) head of Metropolitan Police and Superintendent Crowley of Police Department
Superintendent Crowley and Carvera the prizefighter