The cutaneous ink sign: a tipoff to suicide or suicide notes
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Updated: Nov 1, 2026

Intravascular Perfusion of Carbon Black Ink Allows Reliable Visualization of Cerebral Vessels
Published on: January 4, 2013
Abstract:
The presence of smeared or unsmeared ink on the skin resulting from the writing process has been observed in a number of suicide victims who have left suicide notes. The authors report a case of a palmar "cutaneous ink sign" and discuss its forensic science import.
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