Yes, this is an absolutely awful story.
I wanted to add to the bear spray effectiveness question. I have carried bear spray for 20+ years both for work and personal use but have never had to use it (I have needed to use a gun unfortunately as well as bangers/paintball guns/shotguns with rubber slugs/group chasing and yelling, etc). Several years ago I was hiking with my daughter in thick bush. She was luckily on my back in her kids backpack as she'd gotten tired and was chattering away and told me there was a bear. I didn't think much until she reiterated and I turned around and there was a small to medium sized black bear coming up the trail behind us, not running but intent on us and coming quickly (lets call it a fast jog for a bear). Spun around and pulled out my spray and belt knife as backup and started advancing towards it (loud voice, etc). It stopped about 3 feet from me, snapping it's teeth, trying to circle us and acting very strange. I have been around hundreds of black bears and have never had one act like this (been chased by mad momma bears, etc). I read the Herrerra books years ago and have always been interested (from a self preservation perspective) in bear behavior. It was not a place where I would assume it was a garbage or overly people habituated critter. It did not appear to be angry, had it's ears up for the most part, but was snapping it's teeth and absolutely intent on getting at us from the back. I ran at it a few times and we danced around for quite some time, I would yell and run at it and it would back off slightly, but when I wanted to leave it would come right back at me. It was comfortable being about 4-5 feet from me face to face but when I retreated or tried to walk away it would very deliberately try to get at us from behind. I got tired of this and gave it a shot of spray directly in the face from about 3 feet. It did not make a sound, but bolted away from us so rapidly I was amazed. It ran through willows and thick undergrowth like a freight train, running into everything in it's path. I've used it once, under absolutely perfect conditions/application distance and it worked for me. Do I trust it? Not completely, but will continue to carry it. Was the bear in my encounter predatory? I am not sure, but I am certain things would not have ended well for us.