Schalit?

Gilad Schalit, who has been imprisoned for now for over five years is very close to being set free.  Israel has offered to release one thousand Palestinian prisoners in exchange for Gilad Schalit.  But this brings up the question, is it worth saving one life for a such a large cost?  Some of these prisoners were imprisoned for acts of murder and terrorism.  Through a fully logical perspective, if we accept that one human life is no greater than another human life, then we can conclude that, that if one person is killed by one of these released prisoners then the deal to save Schalit was pointless since one human life was traded for another.  However, if two or more people are killed by one of the thousand released prisoners it would be a loss of one or more lives to save Gilad Schalit.  I fully understand the sadness of this situation, he is a young man who has been imprisoned for five years and I know that if he were my brother or son I would want the trade between the prisoners to happen.  I am not sure how I stand on this issue yet but I just feel that the Israeli government is taking an incredibly large risk by freeing all these prisoners.