Catch A Criminal By CSI DNA Testing Method Basics
Follow the path of CSI in the crime scene to collect DNA samples from hair and blood samples which often used as court evidence.
You can track down a criminal by matching suspects’ DNA with DNA samples from the crime scene.
In these following examples, which is the one who has committed a crime?
It is easy - It like playing a game of searching for similarities. The more similar of the DNA match, it brings higher chances to take the criminal into justice.
Which suspect matches the specimen? - via link
Answer: Suspect 1.
Here’s another one. The answer is on the diagram below.
This is from one sexual assault case. Notice that the female cells and sperms are used as evidence.
Who’s the criminal?
Answer: Suspect 1. Click here to know why.
This is a common method called Southern Blot which is used for developing DNA fingerprints.
There are other ways to produce DNA fingerprint in forensic use - find out here.
The discovery of DNA fingerprinting has solved lots of criminal cases thanks to Sir Alec Jeffreys. Below is a video tribute to Sir Alec Jeffreys by an young amateur. Quite an entertaining clip.
