According to toxicology records, blood tests taken during the autopsy reveal high levels of the drug, Lexapro.
Carrizales had .515 micrograms of citalopram in his system and levels greater than 0.5 are considered toxic.
It's unclear what effect the high levels may have had on the high school sophomore.
carrizales died April 16th after police say he hit a campus officer in the back of the head with a sawed off baseball bat. The officer feared for his life and shot and killed the student. He died from a gunshot wound to the shoulder.
Family members confirmed after his death that Carrizales was taking Lexapro for depression and his dosages were changed shortly before the shooting.
They declined to comment today.
According to the Lexapro website, 15 million adults take the drug to help deal with anxiety and depression. Both problems family members say Carrizales struggled with. Common side effects include nausea and drowsiness.
No other substances were found in Carrizales' system.