Recently, people who have been imprisoned for over 20 years have been released?

Question

Explain how such old evidence samples could still be useful.

Answer 1

I think, all the evidences are based on DNA testing in criminological labs. No matter  how long ago the crime had been committed it is the DNA-sample proofs that are able to verify any crime related facts.

In some cases DNA test verified that a person detained for a long time found innocent.

I got some interesting articles...you may like them. I found them in Yahoo search..

1. http://www.scientific.org/archive/Housto...

2.

http://dbtindia.nic.in/biotechstrategy/D...

3.

http://www.pcmbtoday.com/career/forensic...

4.http://gujarathighcourt.nic.in/Articles/...

5.

http://www.aic.gov.au/publications/tandi...