According to research, it seems that teenagers are getting involved by criminal activities day by day in most countries within the world. The causes of this involvements to be focused on two areas and the number of solutions also appear to be possible. Perhaps a major factor here is bad environment grown up around negative parent who do not care their own child or childhood trauma like bullied by other children can affect their life, and cause to fall throughout life. Second factor is a lack of education which students study. Too much self-studies make children to slack off. Turning to possible solution, obvious step would be teach new parents to take more care of their children. Lastly, make primary school teacher to more educate and watch their students and make less self-study because self-study makes students more individual but not all students. Especially primary school, students need teachers more than anyone. In summary factor of bad environment is main problem.