my son had a shunt malfuntion and it caused his death

That is not a question, but it sounds as if you need to talk with a medical malpractice attorney in your area.  Wrongful death claims must be brought within two years from the date of death, so that is something to keep in mind.  Also, you will need to be able to prove that his death was caused by the shunt malfunction - this typically takes several experts for investigation and confirmation.  I am very sorry to hear about your son, and wish you the best of luck as you pursue this claim.   Jay Mills