As the world evolves over time, the crime rate is also increasing. If we look back then we will realize that how many cases gone cold because of less knowledge and techniques to collect, store and analyze evidence. With passing years many scientists and experts come up with their ideas, researches and technologies which made work of law enforcement easier. But still our society is neither been crime free nor every crime is possible to solve due to less strength of Scientific knowledge and expertise of forensic scientist and experts.