Ballistic fingerprinting began when scientist Alexandre Lacassagne matched an individual bullet to the inside of a gun barrel. He realized that the imperfections inside made every gun unique and special. Not unlike the imperfections of a snowflake.
[Softly, with a nostalgic look in his eye]
Or a toddler with a large nose whose mother still loves him.
[Brody and LaSalle exchange looks]
Right. Moving on.
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