Why Joseph estrada should be pardon?

..maybe because of his old age and because of his mother.. ÖÖ' he was already detained for 6 yrs and 6 months. ÖÖ'but i don't really understand why the process was so fast. did Mrs. Arroyo think about it very well.? ÖÖ' and i think it is also unfair for other prisoners that was detained for many years and was at the age of 70 but doesn't have their parole or pardon.. ÖÖ?