The offender's commitment to the fantasies deepens as he becomes a loner in adolescence, subject to the onset of puberty and sexual arousal. Aggressive, and with a feeling of having been cheated by society, he may channel his hostility into fantasies, which are characterized by strong visual components, and by themes of dominance, revenge, molestation, manipulation, and control. Deviants feel the sexual urge without having learned that it hast anything to do with affection. The cognitive mapping process is almost complete by now, It is the development of thinking patterns that affect how the person relates to himself and to his environment, it determines how the individual gives meaning to the events that happen in his world. He views the world as a hostile place.
Normal people cope with the help of a normal pattern of development.
The potential murderer, however, turns inward and focuses on his own problems to the exclusion of all else, and on fantasies as the solution to the problem, because his mental coping mechanisms are faulty. He may get fired, and therefore encounters other problems, matters that earlier he might have handled in spite of pressures but that now seem overwhelming. He is impelled to cross the line by everything that has previously occurred in his life. Only later, after many violent acts, will he come to believe that he is invincible and will never be caught. Then, the threshold has been crossed, the point of no return is passed.