VERNON HILLS, Ill. (WLS) -- The cause of death has been revealed for a Carpentersville teenager who went missing last month after she apparently drove her car into a pond in Vernon Hills.
The Lake County Coroner said 17-year-old Brissa Romero drowned, and her death was ruled an accident.
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Toxicology tests found she had marijuana in her system and a blood alcohol concentration of point 0.16.
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Romero disappeared while on her way to a holiday party last month.
READ MORE | Brissa Romero found: Body pulled from Vernon Hills pond ID'd as that of missing Carpentersville teen
Investigators found her car in a pond in Vernon Hills.