Dear God, what a horrible, tragic loss.
To be able to forgive while still in shock and grief is a true testament to this gentleman’s character. God bless him!
This is when forgiveness is easiest of all. He cannot think, he's had no time to process anything. He's moving around by auto-pilot (not to be crass). That his first tendency isn't to start blaming others speaks well of him. But I hope he isn't being too hasty.