Invisible Bullet-Tagging Technology Could Deter Criminals

a new nanotechnology system that not only better captures DNA on guns, but attaches hard-to-remove, microscopic tags to the hands and clothing of criminals who fire their weapons.

the tags are a unique blend of naturally-occurring pollen, known for its extraordinary adhesive properties, and nanotechnology particles. The composition can be used as an abrasive coating to capture skin cells on gun cartridges, usually too smooth or shiny to retain much evidence in the way of fingerprints or DNA.

The tags in the coating also transfer themselves to anyone handling the cartridges and are very difficult to wash off.

Most evidence is usually destroyed after a gun is fired, because of the heat generated. The coating has been designed to avoid such heat damage

applying the system to other weapons like knifes.