WATERLOO — Jurors heard about the practice of gunshot residue testing as the retrial continued in the 2013 shooting death of a Waterloo teen. Perquondis Holmes, 25, is charged with first-degree murder ...

Photoluminescent lead detection in gunshot residue. (A) Shooting firearms produces gunshot residue that typically contains lead particulates. (B) Methyl ammonium bromide in the reagent reacts with ...

Add Yahoo as a preferred source to see more of our stories on Google. If you're anything like me, you've spent hours binge-watching crime investigation dramas. Be it True Detective or Dexter, there's ...

The trajectory of the bullet that killed Nikha Marcella DeGuzman and the microscopic gunshot residue allegedly left behind on her boyfriend prove one thing to Alameda County prosecutors: That she was ...