A new study shows about half of all 16- to 18-year-olds being sent to city jails say they suffered a traumatic brain injury before getting arrested.
The report finds most of the injuries were caused by an assault.
Nearly half of all inmates in this age group reported a traumatic brain injury that resulted in unconsciousness and/or amnesia.
Researchers say the results of the study could lead to better training for guards on how to deal with inmates showing problems with impulse control and decision making.
The findings are based on questionnaires given to 300 boys and 84 girls in city lockups.
They will be published this week in The Journal of Adolescent Health.