They kill strangers. When they approach their victims, they begin to socialize with them in hopes of being able to trick them to where the killer is then able to overpower them and make their attack. Their victims t the serial killers victim type as best as possible. They try to choose victims that are not well known to society and do not have much of a family, so that when they go missing, it will generally go unnoticed. With each attack they become more skilled and knowledgeable. Every attack becomes more planned out and better organized. They become more knowledgeable as to where to strike victims. where to kill and dump the bodies, and how to clean up the crime scene to where it becomes harder and harder to gure out who did the killings