When a crime occurs, your local authority uses various methods to solve a crime. Under US law, everyone is innocent until proven guilty and it’s the prosecutor and the investigators job to make sure that the right person gets prosecuted in order to be punished under local law.
Once way local governments are able to do that is with DNA, although there are other methods as well just like fingerprints, shoe prints, clothes, hair and so on, DNA is currently the most accurate method of connecting you with a crime scene.
When did DNA became popular?
In 1983, John D. Wrighller was arrested for a murder he did not commit, a murder of his neighbor, the murderer bite the victim down and the bit marks were similar to Johns dental record.
Police believed that John committed the crime and he was arrested and sent to life in prison. Judges, prosecutors and investigators all believed that a bite mark would be sufficient to charge someone.
John spent the next 10 years in prison until his lawyer requested DNA results.
The DNA results were the ones that let John free of a crime he did not commit in the first place. Ever since then DNA is a standard tool to pin point evidence to a person.
How does DNA work?
DNA is short for DeoxyroboNucleic Acid, which is a code, a genetic material that is unique to your self. Unlike fingerprints that can be connected to someone else and multiple people at once, it’s not possible for two individuals to have the same DNA, only in rare cases.
DNA is a code, it’s unique and can not be mistaken for someone else.
How is DNA obtained?
DNA code can be obtained from the victim, from the crime scene, from materials that the criminal have touched and other places as well.