This is truly saddening to the point I had to come here to answer you personally. I am really sorry for your loss.
However what I can tell you, from personal experience, is that when our loved ones die, they simply leave out for the astral realm, and the Gods take them from there and escort them to safety and/or reincarnation, therefore Alexander is not gone but simply gone from material presence. You will always be with him and he will always love you as these memories are carried together with us as we go.
What you and his father can do is clean yourself, do hatha yoga and meditation. Also, make sure to maintain an optimal diet. Grief is absolutely normal, so if you feel it, understand that this is due to loss, but also remind yourself that life for human beings and Satanists does not end when our mortal shroud leaves us. The human mind obviously cannot keep full awareness of the understanding, but our higher soul knows this Truth all very well.
You can do a ritual to Satan and ask him personally to take care of the soul of the person, he will send Gods to help and heal his soul of any potential issues, then, the person will reincarnate healed. Early mortality is in the Soul and there is no mistake on the part of the parents or anyone else, but rather this is programmed on the individual himself. Bad parenting in past lives of the soul that you had with you can have such results, for example of the soul of someone who has had a bad life. This gets wiped out in the next life, but this can leave karmic leftovers which can ultimately result in an early death, for which nobody else is really responsible. The Gods can and will assist in the removal of such issue.
What you can do also is daily put an aura of protection around Alexander, and clean his aura and chakras as you clean yours, but without very intense blinding light. If you apply this light only do this around the person and not inside the person. Keep it simple and put an aura of protection around him for at least 40 days. You can use the rune Algis and Sowilo to achieve this. You can do this exactly as you would do this to anyone else. This will guarantee his protection to his next lifetime, so in conjunction with the help from the Gods he will be just fine and happy.
It's better that you do not act like he is gone, because he is in the astral and he will probably feel sad if you consider him gone. Consider this only a transient separation. I tell you from personal experience of years of working with people who are 'deceased', nobody really goes, let alone SS and those close to them who are rescued and helped after their mortal body gives in.
I wish you the best of luck and a fast spiritual recovery.
