**Acknowledgements**

We want to thank open source Intech Publishers and the editor of Forensic Analysis who invited us to write a chapter in this book. We also would like to thank all the authors whose hard work, articles and literature make our knowledge and understanding rich. But, at this stage of life, we are still learning. This concept of open source publication is very encouraging for all those who cannot pay and want to learn. This is our effort to reproduce the work of all the referenced authors and editors in our own language for the better understanding of our readers. Thanks.
