The Psychology behind defending a murderer is so multi layered. The inability for a person to accept that someone is capable of doing an evil frightening thing, sticking a blade into a person 29 times, standing over them, grabbing them by the back of the hair when they are seconds from death anyway, and reaching down and with great force, putting the blade in one side of the throat and dragging it along while holding his head to just about decapitate him, then taking your semi-automatic and raising it and cocking the trigger, and firing a shot into his head when in all likelihood he was laying there dead, is puzzling to most.
There will always be the few that believe everything they hear, especially from a woman saying a man was mean to her. This points more to their own personal issues which have brought them to a point of having poor judgement. There are also those that gravitate to the dangerous. They visit killers proclaiming their innocence after they carried out mass murders on video, they are driven to support the accused especially in heinous crimes because they get a feeling of power getting close to dangerous people.
Then thankfully there are the majority, that can listen carefully and logic and instinct bring them all to the same conclusion. Going through life, if you find you have people that want to get into your own inner circle and they are the "go toward danger" type, I always say, move them away, keep them at a distance because they will put you in danger also.
