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Head injury can dramatically increase the chances of someone committing violent crime, a study has found.
In a large group of 22,914 traumatic brain injury victims, almost 9% went on to commit acts of violence after diagnosis.
Compared with the general population, people with brain injuries were three times more likely to perpetrate violent crimes.
The British and Swedish researchers who carried out the study defined violent criminals as those convicted of homicide, assault, robbery, arson, sexual offences, or illegal threats or intimidation.
Epilepsy was also investigated as previous studies have suggested it can increase the risk of violence.
