"that other fatal profectile might as you say have been fired from a paintball, low lethality weapon and be an unlucky hit."

So what do you think it was firing Keith? hardly a paintball if it had "pellets usually used in shotguns"

"A pepper-spray projectile, also called a pepper-spray ball, or pepper-spray pellet is a projectile weapon made up of a powdered chemical that irritates eyes and nose (see pepper spray).
These less-lethal weapons launch a fragile ball which breaks upon impact and releases a super irritant powder called PAVA (capsaicin II) pepper

Although generally considered non-lethal when properly used (targets should exclude the face, eyes, throat or spine), deaths have occurred when they have been fired at inappropriate areas.
In one well publicized incident, in 2004 where the Boston Police Department during crowd control situation killed 21-year-old Victoria Snelgrove using a pepper-spray projectile weapon"

But this was NOT paint, NOT pepper.......

It was multiple 9mm shots mainly to the head which caused the fatal wounds of those victims autopsied - however, most reports suggest that six victims are still missing.