Can old DNA record be used after about 10 years?

Question

I was wondering if let's say; someone is accused for raping and his DNA was taken for the test. and then it turns out he is innocent.

then maybe after about 10 years, he is accused again for the same reason. Is it necesary to take his DNA again? I mean, does the old DNA record cannot be used for testing?

Anyone here is expert on this DNA thing? Thanks

(sorry for my english)

Answer 1

I am not an expert, but have heard of old DNA being used a lot on the News lately.  So, I assumed it can.  A case from the 70's was solved recently with DNA.

Answer 2

over ten years there shouldn't ever be enough variation to conclude his DNA would be anyone elses..

basically no, they can use the same one..

Answer 3

It depends, usually  the condition the original sample was in, it must also  be preserved correctly. Usually it is frozen. If it was originally in a good condition and was stored properly then yes it can be used after 10 years

Answer 4

Physically there is nothing wrong with the old DNA.  The old DNA record is digitalized, and your DNA fingerprint does not change as you age.

A separate legal concern though is whether the records of somebody innocent are kept...from what I've researched just now...

If he was found innocent/acquitted, the rapist could apply to get his record removed from DNA databases, at least currently in the United States (based on 4th amendment rights).  The record is not removed voluntarily.

In the UK, however, the rapists DNA profile would remain on their database.

Please keep note that the legal stuff is based on what I can find on google.  There are some variations state to state in the US.