Public Perception - Questions on DNA

I heard this news on the radio this morning, also in the star newspaper. Read more here;

Govt studying best way to reduce power tariff hikes

"Shaziman said Malaysia's power reserve margin capacity level was not too high at 41%, and plans were underway to reduce this amount to 25% by 2014."

Note the timing. Is the government heeding Anwar's idea now? After the debate?

Another thing that's baffling me is the question of how long a DNA sample can last?

I think once a DNA is taken from someone, no matter how many years, it will still be the same. The characteristics will not change isn't it?

Out of the sample, blood, semen, hair, swabs or anything. I think they will produce codes, these series of codes are used in the DNA matching, based on certain sets of algorithm which only DNA experts can tell.

If that is true, then the matching is not done organically, as such, no flesh vs flesh comparison, or no semen vs semen comparison for that matter. All can be done via computer, because the so-called codes should already in a dna codes database somewhere.

This concept is similar to fingerprints matching. All matching are done by codes vs codes in computers.

Computers will extract binary codes (minutiae) from fingerprint images, the binary codes will then be stored in a database. If there is a need to identify someone's fingerprints, his live fingerprint image will be captured or dusted out from a latent fingerprints found in a crime scene, converted into codes, and matched against database of codes.

Out of the identification matching process, adhering to a certain matching threshold, list of candidates will be presented to the users. From there you can call the candidates as suspects for questioning.

That's why im wondering why the police required a fresh DNA sample from Anwar?

Think about it.