FBI agents examine knives and guns used during crimes at a laboratory in the United States.
United States USA Date:1936 Duration:2 min 17 sec Sound:Yes
Federal Bureau of Investigation (FBI) agents investigate cases through scientific methods in the United States. Four knives used in a crime are placed on a table. Minute particles of zinc and copper on the knives are inspected. A man examines the sample. Men examine the guns used in a crime. A gun is fired and then examined. A man looks at the sample through a microscope. Other man seated nearby examines other sample.
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