If the accident occurred while on the job, she can bring a claim. Be careful regarding the statute of limitations in California. Since I am not a CA attorney, you should contact a local one to determine such.
It may not be too late to file a workers' compensation claim. Notify your former employer if you haven't done so already, and see the doctor as soon as possible. Find a local attorney and ask for an initial consultation. Don't delay - there are deadlines for filing a claim.