You contradict yourself by saying that bad things are a logical result of multiple events and then saying that you "could" have done something different. Our brains are just a bunch of chemicals that form organic materials called neurons that process and share information using electric-chemical reactions called synapses. Meaning that if you are a murderer you are as responsable for killing as the sun for shining (that doesn't mean we shouldn't lock murderers aways, please don't bring that argument).