I do not understand why Lee Chak Yan signed apology letter so that he could be released and come back to HK. Once Lee decided to take HK money to Tian An Mun Square and he should prepare himself as a martyr.
It is just an openning door, it cannot be closed unless being forced. The door will be gradually openned. Perhaps it needs to wait until the ones involved in this incidence die so that the fact can be disclosed.