3

1. Polymer bag without an inscription, inside of which there are 5 metal fragments.
2. Polymer bag with the inscription: "Fragments from trees at a distance of 20 to 30 m from the crater", inside of which there are many metal fragments, some of which have traces of high-explosive impact.
3. Polymer bag with the inscription: "Kor 4", inside of which there are many cotton swabs with washings.
4. Polymer bag with the inscription: "Kor 4", inside of which there are many cotton swabs with washings.
5. Polymer bag with the inscription: "Fragment found on a flattened pipe in the crater at a depth of 2.5 m", inside of which there is a metal fragment.

Upon opening box No. 5, the following was found in it:
17. Polymer bag with the inscription: "Fragments collected near the radio plant", inside of which there are many metal fragments, some of which have traces of high-explosive impact.
18. Polymer bag with the inscription: "Roof of the radio plant", inside of which there are many metal fragments, some of which have traces of high-explosive impact.
19. Polymer bag with the inscription: "Department of Internal Affairs (OVD) yard", inside of which there is soil.
20. Polymer bag with the inscription: "Edge of the crater", inside of which there is soil.
21. Polymer bag with the inscription: "20 - 30 m from the crater", inside of which there is soil.
22. Polymer bag with the inscription: "Soil sample at a large distance from the explosion (> 1 km)", inside of which there is soil.
23. Polymer bag with the inscription: "Department of Internal Affairs (OVD) yard from the entrance side", inside of which there is soil.
24. Polymer bag with the inscription: "60 - 70 m from the crater", inside of which there is soil.

2. Physico-chemical studies

(conducted by expert Stovbur K.N.)

To answer questions 3 and 4 of the resolution, the expert selected the most informative samples from among those presented, namely: fragments (items 1, 2, 5, 8, here and hereafter items of the "External examination"), washings (items 14 and 15), as well as soil samples from the scene of the incident (items 19 - 24).

The studies were carried out using the methods of optical microscopy, high-performance thin-layer chromatography (HPTLC), ion chromatography (IC), gas chromatography-mass spectrometry (GC-MS) and X-ray spectral microanalysis (RSMA) in the following sequence.

Initially, for the detection of microparticles of components of mixed explosives (HE), pyrotechnic compositions (fine-dispersed