How FBI tested Marwan's DNA

MANILA - Philippine operatives gave the US Federal bureau of Investigation (FBI) a photo and a DNA sample of the supposed remains of terrorist Zulkifli bin Hir alias Marwan.

Preliminary results indicate that the DNA profiles obtained from the biological sample indicate a possible relationship with a known relative of Marwan.

Based on a statement the FBI sent to ABS-CBN News' North America bureau, preliminary results of the DNA test show it's possible that the man killed during the Maguindanao raid is related to a known relative of Marwan.

"Although the results of the DNA examinations do not provide absolute identification, the results do support that the biological sample provided by Philippine authorities came from Marwan," FBI official David Bowdich said. "Further testing and analysis will be conducted by laboratory examiners in an effort to fully identify the subject of dna provided to the FBI."

Forensic experts from the National Bureau of Investigation (NBI) said DNA samples may be taken from the blood, tissue, or hair of a dead person.

If the person is still alive, buccal swabbing wherein DNA samples are obtained from a person's blood or saliva may be conducted.

DNA samples are also taken from relatives of the subject and these undergo several processes like a genetic analyzer.

It only takes days for the results to come out.

The NBI said fingerprint analysis will be most accurate in identifying Marwan.

The NBI added that each person has a unique fingerprint.

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How FBI tested Marwan's DNA