Pyrotechnic Reaction Products of. Lee M. Fadness James D. Garcia David B. Flohr. a Different Kind

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Pyrotechnic Reaction Products of Lee M. Fadness James D. Garcia David B. Flohr a Different Kind

Disclaimer The opinions or assertions contained herein are the private views of the author and are not to be construed as official or as reflecting the views of the Department of the Army or the Department of Defense.

Normally GSR or Fireworks Residues come to mind when we discuss Pyrotechnic Reaction Residues and Automated SEM Particle Analysis of adhesive stub collections from hands

We think of round particles!

Philips XL3 CP Oxford s ISIS EDS / WDS Sample Sub-Stage shown with 4 stubs bearing collected residue and two stubs bearing reference standards

Situation #1 - Subject throws M67 Hand Grenades and Thermite grenades inside tents, shoots fellow soldiers as they exit - Subject flees the scene, apprehended in remote area

- GSR 4 stub kit - Negative for GSR - Non-GSR but Ba / Cr rich particles in unclassified particles list for GSR kit and subjects uniform

What were those particles? Could they be used to link the subject to the scene?

M67 Fragmentation Grenade Anti-personnel device designed to kill, or incapacitate

Essential Components of M67 Grenade M213 Fuze (cast Zinc) Low Carbon Steel Grenade Body

M67 Grenade Unique Design Components Jungle Safety Clip Pull Ring / Safety Pin M213 Fuze Lever

Grenade Body Lever Lever Kill radius: ~15 feet Casualty radius: ~5 feet Throw: ~12 feet Fragmentation: ~75 feet

Internal Components M42 Shot Gun Primer Spring Actuated Firing Pin Gas-less Delay Mixture Detonator (RDX base) Comp B (RDX/TNT) Filler Coined Interior Surface for Consistent Fragmentation

Typical Shrapnel 1 mm

Column of Delay Mixture ~ 2 mm (H) x ~ 5 mm (D) 1.29 grams of material

Delay Mixture Type 2 Barium Chromate (6%) 1 mm Zirconium / Nickel Alloy (26%) Potassium Perchlorate (14%)

Type II Delay Mixture KClO 4 3-6 µm Zr/Ni 15-25 µm BaCrO 4 1.5 um Lumps 1-5 µm

1 st Grenade Range Test 4 x 4 ft. box built to Catch Residue 3/4 inch plywood exterior ¼ inch MDF board inner face/liner DCU Catch cloth inner liner 4 x 4 posts along all edges/corners 6 inch hole in top for insertion of Grenade

1 st Grenade Range Test

Delay Mixture Analysis Philips XL3 CP Oxford s ISIS EDS / WDS Uncoated Variable Pressure

Residue Collection / Analysis ½ inch SEM Traditional GSR Auto-Search Routine Element Categories Modification: Ba / Cr / Ni / Zr / K / Cl (Delay) Ba / Cr / Ni / Zr Ba / Cr Ni / Zr Ni Ba (5%)

Situation #2 - Subject initiates claymore mine which kills 2 Officers in his command - Subject throws three M67 Grenades to simulate a mortar attack as a diversionary tactic - Subject arrested 7 days after incident

Aerial Photo Crime Scene Blast site 2 Blast sites LAKE (DRAINED) Control soil Claymore blast N

DELAY ELEMENT classified particles found 3 Suspect Grenade Detonation Points Attaché bag (6 particles) Gloves (5 particles)

2 nd Range Study Performed to Answer A Singular Question: What is the Distribution Pattern for the Delay Element Residue?

Witness Plates Center ~ 4 ft from ground Metal Fence Stake 2x2 ft Plywood Covered with Cloth Range Soil

Test #3 12 Witness Panels 3 Degrees Apart 45 foot Radius North Plywood Witness Panel M67 Grenade

Test #2 16 Witness Panels 22.5 Degrees Apart 67.5 foot Radius North M67 Grenade

Test #1 2 Witness Panels 18 Degrees Apart 9 foot Radius North M67 Grenade

North Tests 1, 2 and 3 48 Witness Panels 45, 67.5 and 9 ft. radius

Post Detonation Collection 15 sticks per panel ½ inch SEM stubs 5 left / 5 center / 5 right Range Soil

Test #3 45 foot radius North 1 25 21

Test #2 67.5 foot radius North 9

Test #1 9 foot radius North 11 6

Nodular Rounds

Massive Irregulars

Small Rounded

Other Indicative Particle Fe Zn

Al

Particles with Low or Absent Elements Ni

Quartz Grains with Zinc Splattered on Surface

Questioning the Forensic Use and Utility of this Information? June 24, 211

Seattle Terrorism Plot Foiled as Abu Khalid Abdul-Latif & Walli Mujahidh are arrested SEATTLE KDVR: Foiling a deadly terrorism plot, federal authorities Wednesday night arrested and charged two men with planning to attack a military processing office in Seattle with guns....

and grenades!!!!