Green is in. Even the army is making sure to use environmentally friendly paint on its bombers
and environmentally conscious people who have made great efforts to put ethical bullets into mainstream use will be happy that their lead-free status will no longer leave crimes unsolved.
Scientists in Texas say a new, inexpensive test requires only a single speck of gunshot residue (GSR) smaller than the period at the end of this sentence and it could boost the accuracy of results at crime scenes involving gunplay.
Many of the current methods are susceptible to outside interferences that can produce false positive or false negative results. For example, most tests require the presence of lead for a valid reading, including two of the three mainstays of residue analysis — the sodium rhodizonate test and scanning electron microscopy with energy dispersive x-ray detection.