Let me be the respectful dissenter here.
I think that I'll join you.
According to
this source, Manslaughter is defined in Canadian Law as follows:
Manslaughter Accidental
homicide or homicide which occurs without an intent to kill, and which does not occur during the commission of another crime or under extreme provocation.
So it seems as though this event certainly fits the definition. According to
this article, "another soldier's gun went off", killing Walsh. So, it seems that, though there may have been no intent, and completely accidental, the soldier charged is responsible for Walsh's death, and should be held to account, IMO. The law must apply equally to all citizens, irrespective of the individual circumstances.
As per the same article quoted above, it seems that the deceased's father is in agreement:
Walsh's Father said:
I would say it's like if I hit you in the head and you fell and died. It would be a manslaughter charge. It's a bit severe, but ... I guess in this case, it may be necessary.
Now, I don't agree with his comparison - in a circumstance where one hits another in the head, there is still intent to do harm, and that's not the case here. However, it is the result of negligent care of his firearm, and for that, there need be consequences.
It is totally unfortunate that the accused and the deceased were friends, and that the entire thing was accidental. But, I ask, how would the accused feel if someone accidentally shot his wife? Or child? I'm reasonably certain that he'll accept these charges as being appropriate, and only hope that the presiding judge will exercise some compassion and discretion when it comes time for sentencing.