Arrested Abu Sayyaf leader the wrong man?

WAS it just another case of mistaken identity when government security forces arrested the alleged sub-leader of the Abu Sayyaf (ASG) involved in the Lamitan siege of 2001?

The Philippine National Police (PNP) in Western Mindanao on Tuesday announced the arrest of Nasser Usman in Lamitan City in Basilan by combined police and military troops.