First, let me differentiate between types of environmental factors. Video games, movies, TV shows and the like probably cannot produce a psychopath, although I can think of extreme conditions that would have a severe negative influence such that a child would grow up thinking that destructive psychopathic behavior is acceptable. This would require that the child be programmed by heavy, routine exposure to media that promotes such behavior as normal over a period of years, starting as a toddler. This type of programming is more easily reversible, I am fairly sure, than what happens to a psychopath. Media can cause a child to believe that rape, theft, and even torture and murder are acceptable and even positive behaviors.
Thus, I am confused by your statement about video games and psychopaths. Psychopathy is caused by (rarely, I suspect) genetics, more often by pre- and post-natal damage, and most often by emotional and physical abuse of an extreme sort.
I am not aware of what criteria you have observed in your brother that makes you feel your brother, Jhonathan, is a psycho. Please list as many symptoms as you can, including about relationships/marriage, criminal behavior, manipulation, high-risk behavior, lack of planning for the future, etc. His behavior and that of his son could be the result of something else, such as another mental illness, or conscious decisions, but his son is probably the way he is because Jhonathan taught him to be that way. I await further info from you.
Please do keep in mind that I am not a psychologist; I'm just trying to be helpful by using my logic and knowledge of psychology...
thank you for clarifying the points I will take much into account @reveurgam the truth if they take points about my nephew's case the same parents will be harmed the father and mother support him that everything he does is fine but I see him from another thank you for giving me your point of view a cordial greeting from here VEnezuela @neymarth10
Feel free to share with me the things he and his son do that make you feel he is a psychopath. Again, he may just have chosen the criminal life for other reasons. Mucho gusto!