An expert on gunshot residue told the Supreme Court that particles found on the hands of a defendant did not necessarily mean he had fired a gun. Tarah Helsel, a gunshot residue expert with the ...

The Supreme Court heard that particles characteristic of gunshot residue were discovered on the hands of a man charged with murder. Tarah Helsel, a GSR expert from Pennsylvania-based RJ Lee Group, ...

Police witnesses testified that they put a plastic bag on Reed's right hand in order to preserve evidence until swabs could be taken for a test for gunshot residue, often referred to as GSR.