[Cboldt]

I read an account that there is gunpowder residue on Zimmerman’s clothing too.

[EnglishCon]

I read an account that there is gunpowder residue on Zimmerman’s clothing too.

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First I have seen on that.

Blowback perhaps? No idea what type of weapon Zimmerman had, but if you shoot someone/something from close enough you can often get residue back scattering.