Abstract: A computer-implemented method and a system for dating a blood pool lying on a substrate are described. The method comprises: determining, based on at least one picture of a blood pool lying on a substrate taken at a given time (t), the drying front of the blood pool at the given time (t); and determining, based on the determined drying front of the blood pool at the given time (t), and on a drying model, the time elapsed between the given time (t) and an initial time (t0) at which the blood pool initiated a drying process on the substrate. Determining the drying front of the blood pool comprises determining the wet perimeter (Pt) of the blood pool, and the drying model correlates the time elapsed with a blood's diffusion coefficient (Dblood) measured for a plurality of predetermined environmental conditions and a plurality of initial blood pool conditions.

Abstract: A device for collecting biological material, characterized in that it comprises a rod having, at one end, a dry absorbent body having a surface area of between approximately 1 and approximately 3.14 mm2, said absorbent body comprising surfactants and denaturing agents. The present invention also relates to the use of said device for sampling biological material from a biological trace having any surface area greater than a micro surface area of around 1 mm2 or having any volume greater than a micro-volume of around 1 microliter, and to a method for collecting biological material and a method for collecting and analyzing and/or identifying biological material, comprising a step of putting said device in contact with said biological material.

Abstract: An ammunition projectile for a firearm comprising a projectile having a nose and a cap which is designed to slow down sufficiently, when traveling through air so as to be stopped by a bulletproof vest while the projectile still has a precise and reliable trajectory. The projectile (10) has a generally truncated nose (11) and a cylindrical cap (12). The nose (11) is provided with a central, essentially circular flat section (13) which can be made larger or smaller and which has a diameter of between 10 and 50% of the diameter of the projectile at the base of the nose (11) or the cap (12). The lateral face of the truncated nose (11) is provided with five indentations (14) which are disposed symmetrically in relation to axial planes and which are obtained by one of stamping, milling, or some other suitable machining method.