As for the life for a life, there must be two reliable witnesses and it must be established by the court.
As for deciding that someone has left Islam, it is not something that is carried out by every individual. We can’t say someone said or did such-and-such, and because of it they are no longer Muslim so we have to kill them or take away their property. This is nonsense. It needs to be established by some sort of body that is official.
