find the hidden finger prints...

Everyone in the world have an unique thing that will never coincide with the other person. It is nothing but the finger prints. It plays a key role in identifying the criminals. But some criminals are clever that they will erase all the finger prints after they have finished their job. In such cases, you cannot trace or identify the finger prints. So the forensic scientists of United Kingdom had involved themselves in a research to overcome this problem. And now they have succeeded too. The new technique involves noticing the physical change of the metal. Since the human sweat has more salt in it, even though the criminal erases the prints, it will be of no use. By tracing these salt molecules, even the hidden finger prints (which means erased) can be found easily. So I hope that, this new technique will help the cops to identify the criminals very easily…