Most of the time the co-dependent person makes excuses for the person they have a soul tie with. They do this by explaining away bad behavior. They call themselves supporting the person; backing them up, helping them through problems in life. The problem with that is the person that has the trait of a murderer is emotionally and socially incapable of having compassion for the people they are around, and that extends even to the person they have a soul tie with. They generally are so cold and callus that they can't see compassionately when it comes to the needs and wants of others.