Harrison and Gilroy Method

In 1959, Harrison and Gilroy introduced a method based on the detection of the metal-containing components of FDR.124 The metallic components involved, namely, lead, antimony, and barium, originate from the primer and the bullet lead and antimony . The method is based on colorimetric spot tests and involves swabbing the suspect's hands with cotton cloth damped with 0.1 M hydrochloric acid. The swab is allowed to dry and is then tested with one or two drops of a 10 alcohol solution of...