what are the steps to find out the information regarding my dads arrest ?

I am currently a student at California State University, Los Angeles studying socilogy. As a teenager I was informed that my biological father suffered from mental illness, schizophrenia. He was absent from my life for many years then one day he showed up at our home and was hospitalized for the first time. Before that, he was highly medicated for many years and struggled to keep up with the medication. After a confrontation that led to an incident with the police, my father was severely beat and left brain dead. This happen in the area, San Fernando Valley. The police station that my father was in is San Fernando Police Department‎. I have been devastated ever since it occurred, which was December 14, 2013.My family went through a tough trauma because of my father’s hospitalization. I was left without answer and a lack of understanding for what had happen to my father.