<div dir="ltr"><div id="toolbar" class="">
</div>
<div id="titlewrapper_medium">
<h1 class="">
<a href="http://www.popsci.com/science/article/2012-12/bullet-solves-crime-tagging-shooter-and-snagging-their-dna">Bullet Solves Crime By Tagging Shooters And Snagging Their DNA</a> </h1>
</div>
<div id="node-68059" class="">
<div class="">
<div class="">
<div class="">
Nanomaterials scientists develop a solution to the problem of
heat--emitted when a weapon is fired--destroying precious DNA evidence.
</div>
<div class="">
<span class="">By Amber Williams</span>
<span class="">Posted 12.06.2012 at 1:38 pm</span>
<span class=""></span>
<span class="">
<a href="http://www.popsci.com/science/article/2012-12/bullet-solves-crime-tagging-shooter-and-snagging-their-dna#comments" rel="comments" class="">0 Comments</a> </span>
</div>
<br>
<div class="">
<img src="http://www.popsci.com/files/imagecache/article_image_large/articles/bulletillustration.jpg" alt="Bullet Proof" title="" class="">
<div class="">
<span class="">
Bullet Proof </span>
<span class="">Davvi</span>
</div>
</div>
<h3>THE PROBLEM</h3>
<p>Sherlock Holmes could look at a gun shell and know exactly what went
down. The firearm? The shooter’s stance? The culprit? All revealed with a
glance. In the real world, using a shell to solve a crime is a
painstaking, and often unsuccessful, process. Investigators may be able
to match a bullet with a gun type, but that doesn’t necessarily lead to
the person who shot it. Useful fingerprints are rare, and the heat of
firing a weapon can destroy DNA evidence.</p>
<h3>THE SOLUTION</h3>
<p>A team of nanomaterials scientists led by Paul Sermon, of Brunel
University in England, has developed a bullet that captures the DNA of
anyone who touches it—and leaves a tracer on the person, too. </p>
<p>Scientists dipped a bullet in a formaldehyde-urea resin, creating a
microscopic scratchy surface that snags skin cells. When fired in lab
tests, the bullet retained 53 percent more analyzable DNA than an
untreated one.</p>
<p>The team needed a compound that would tag whoever handled a bullet,
something both sticky and rare enough to be recognizable. They started
with a natural source: pollen. Because of its rough texture, pollen
clings to skin and clothing; some grains even remain after a handshake
or a run through a washing machine. They’re also invisible to the human
eye. Pollen alone, however, isn’t unique enough to pinpoint a criminal.
So the team coated Easter lily pollen with a 63-nanometer layer of
titanium dioxide—a combination that doesn’t exist in nature. A bullet
painted with thousands of the modified pollen grains would mark a
shooter’s finger when he loads the bullet. To have any effect on crime,
governments would have to require that ammunition manufacturers make
modified bullets; Sermon’s team is in talks with U.K. officials.</p>
</div>
</div>
</div><br clear="all"><br>-- <br>Art Deco (Wayne A. Fox)<br><a href="mailto:art.deco.studios@gmail.com" target="_blank">art.deco.studios@gmail.com</a><br><br><img src="http://users.moscow.com/waf/WP%20Fox%2001.jpg"><br>
</div>