District Attorney Lisa Green will hold a news conference Monday morning to announce her filing decisions related to the Taft Union High School shooting.
That could be whether to charge 16-year-old Bryan Oliver as an adult.
17 News spoke to criminal defense attorney Kyle Humphrey about what those decisions are usually based on.
"If they're not sure whether the person should be tried as an adult, they can do what's called a fitness hearing in juvenile court, where a judge would look at multiple factors such as the seriousness of the crime," said Humphrey. "The seriousness of the person's record. There are five factors the judge would consider to find the person unfit to handle as a juvenile and have them handled as an adult."
In California, children as young as 14 can be tried as adults, depending on the seriousness of the crime.