Children with childhood or adolescence onset of Conduct Disorder are predisposed to a life of criminal activity.

According to Wikipedia "Conduct Disorder ( CD) is a mental disorder diagnosed in childhood or adolescence that presents itself through a repetitive and persistent pattern of behavior in which the basic rights of others or major age-appropriate norms are violated".

Conduct disorder can also be refers to a group of behavioral and emotional problems where the person has great difficulty following rules and behaving in a socially acceptable way, and where the rights of others or the social norms are violated. It is actually a serious disorder that endanger the sufferer and others.

EFFECTS OF DEVELOPMENTAL STAGE ON CONDUCT DISORDER
Currently, there are two possible developmental stage are thought to lead to conduct disorder. They include:
           "childhood-onset type"
This occurs when conduct disorder symptoms are present before the age of 10 years. This course is often linked to a more persistent life course and more pervasive behaviors. Specifically, children in this group have greater levels of ADHD symptoms, neuropsychological deficits, more academic problems, increased family dysfunction, and higher likelihood of aggression and violence.

            "adolescent-onset type"
This occurs when conduct disorder symptoms are present after the age of 10 years. Individuals with adolescent-onset conduct disorder exhibit less impairment than those with the childhood-onset type and are not characterized by similar psychopathology. At times, these individuals will remit in their deviant patterns before adulthood.

Many factors may contribute to a person developing conduct disorder, including:

Lower level of fear( Major Cause)

Brain damage

Child abuse

Genetic vulnerability

School failure

Traumatic life experiences

         SIGNS and SYMPTOMS ARE:

Overaggressive  behavior

Bullying

Physical aggression

Cruel behavior toward people and pets

Destructive behavior

Lying

Truancy

Vandalism

Stealing
Moreso, Conduct disorder is a disorder of childhood and adolescence; after the age of 18, a conduct disorder may develop into antisocial personality disorder.

Although the exact cause of conduct disorder is  unknown, but it is believed that a combination of biological, genetic, environmental and social factors play a role.

DYSFUNCTIONAL FAMILY IS LINKED TO CONDUCT DISORDER
Conduct disorder has been associated with dysfunctional family life such as:

Inconsistent discipline by parents

Child  abuse

Poverty

Traumatic experiences

Injuries to certain areas of the brain( special chemicals in the brain called neurotransmitters)

Genetic factors

Parental drug addiction

Alcohol addiction.

Maternal smoking during pregnancy.

The diagnosis of conduct disorder is more common among males. Children with conduct disorder tend to be impulsive, difficult to control, and unconcerned about the feelings of others.

MEDICAL DIAGNOSIS OF  CONDUCT DISORDER
The diagnostic criteria for Conduct disorder is published in the Diagnostic and Statistical Manual of Mental Disorders (DSM-IV-TR). The diagnostic criteria for Conduct Disorder as listed in the DSM-IV-TR are as follows:
The disturbance in behavior causes clinically significant impairment in social, academic, or occupational functioning and there is present a repetitive and persistent pattern of behavior in which the basic rights of others or major age-appropriate societal norms or rules are violated, as manifested by the presence of three (or more) of the following criteria in the past 12 months, with at least one criterion present in the past 6 months:
aggression to people and animals
often bullies people, threatens, or intimidates others
often initiates physical fights
has used a weapon that can cause serious physical harm to others (e.g., a bat, brick, broken bottle, knife, gun)
has been physically cruel to people
has been physically cruel to animals
has stolen while confronting a victim (e.g., mugging, purse snatching, extortion, armed robbery) has forced someone into sexual activity has deliberately engaged in fire setting with the intention of causing serious damage has deliberately destroyed others' property (other than by fire) has broken into someone else's house, building, or car often lies to obtain goods or favors or to avoid obligations (i.e., "cons" others) has stolen items of nontrivial value without confronting a victim (e.g., shoplifting, but without breaking and entering; forgery) often stays out at night despite parental prohibitions, beginning before age 13 years has run away from home overnight at least twice while living in parental or parental surrogate home (or once without returning for a lengthy period)
is often truant from school, beginning before age 13 years.

PREDISPOSED TO A LIFE OF CRIMINAL ACTIVITIES.
Children with childhood or adolescence onset of conduct disorder, attention  deficit disorder with or without hyperactivity (ADHD), and/or antisocial personality disorder (ASPD) are more predisposed to a life of criminal activity. These disorders are often co-morbid, which means they affect the occurrence of one or the other, and in the instances where a child has more than one disorder, the higher his inclination for adult criminality will be. Males are more influenced by these disorders than females. Females usually learn to channel their behavioral problems or develop psychological problems or disorders. In some cases, this means that these women will become criminals.

However, this does not mean that every child who is diagnosed with one or more of the disorders mentioned will be a criminal, but the rate of occurrence is significantly high. Around half or more of these children will commit serious criminal activities and develop arrest records.

TREATMENT OF CONDUCT DISORDERS
Treatment is based on many factors, including the persons age, the severity of symptoms as well as the person's ability to participate in and tolerate specific therapies. Treatment usually consists of a combination of the following:
Behavior therapy as well as reality therapy and psychotherapy are usually necessary to help the person learn to appropriately express and control anger. Cognitive-behavioral therapy aims to reshape the child's thinking (cognition), to improve problem solving skills, and develop anger management and impulse control.
Family therapy may be used to help improve family interactions and communication among family members. A specialized therapy technique called parent management training (PMT) teaches parents ways to positively alter their child's behavior in the home.
Treatment may also include medication. While no specific medication has been formally recognized and approved to treat conduct disorder, various medications may be used to treat some of its distressing symptoms such as attention deficit disorder (ADHD) and depression.