1. A method of detecting and distinguishing between inorganic and organic gunshot residue particles, said method comprising: providing a sample comprising gunshot residue; subjecting the sample to spectroscopic analysis to produce a spectroscopic signature for the sample; detecting the presence of inorganic gunshot residue particles based on the spectroscopic signature for the sample, wherein the inorganic gunshot residue particle has a size of 0.2 μm to 10 μm; detecting the presence of organic gunshot residue particles based on the spectroscopic signature for the sample, wherein the organic gunshot residue particle has a size of 10 μm to 1000 μm; and distinguishing between inorganic and organic gunshot residue particles based on the spectroscopic signature of the particles.