Getting involved in drugs at a young age. Getting in with a bad crowd. Having a history of neglect or abuse. Mental illness. Having a history of family issues in general. Depression, or anxiety. Enviormental factors such as living in a place with a high crime rate. Social issues. Bullying. Physical or mental diseases. Growing up in an unstable enviornment. Having a family history of violence. Having a friend or family member who has taken part in gang violence. Influences in general.