What are you going to claim for? Were you dependent on him financially?
No. I'm really sorry. Criminal injuries compensation is only available to the immediate victim.
Proceeding on the basis that negligence can be shown, there is a claim but unfortunately not for the value of your son to you. The only thing that would be assessed is his actual legal value which sadly is much higher if a person is economically active than if he is not. Your granddaughter would have a much better claim anyway as she is dependent on him presumably but since he was not earning the claim would be very low. I'm afraid it would only be for the sum of money than he could have produced if he had lived.
I'm very sorry about your loss but that is the legal position.
Can I clarify anything for you?