This is only true with color laser printers and copiers. If they used an ink-jet printer, or a B&W laser printer, then there is no identifying mark.
This is only true with color laser printers and copiers. If they used an ink-jet printer, or a B&W laser printer, then there is no identifying mark.
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This is true. I would imagine the vast majority of home printers, unless one has a business requiring volume printing, are color printers.
So many of these crimes end of being self-perpetrated hoaxes, it almost makes them a sure bet.