I have a cousin who we think is a sociopath. He's in his mid twenties and is in a gang, has been for a while. He's been arrested several times. He has a little 6 year old nephew who is terrified of him and refuses to enter his bedroom (the grandmother tried to let him have the room because my cousin no longer lived there but the boy was too scared to go in). My cousin seems jealous of him. I remember as a kid we were going to have him over once (he lives in another state) and my grandmother came over and told all of us to hide our money and valuables. I was scared but when he was here I thought he was one of the nicest people I'd ever met, VERY polite. He carries weapons all of the time, there have been drive by shootings at his mother's house, it's a mess. My mom said that they could all tell he wasn't right even as a small child. He threatened to stab his mom to death when he was like 5 or 6. I definitely think it's something you can be born with, something in the genes.