@sunnySkys - Wow, it's unfortunate that someone had to get hurt before anyone realized that manager was behaving negligently. What a bummer.
It just goes to show that people in management positions have a lot of responsibilities. I mean, look at all the stuff that a warehouse manager does: safety checks, hiring, and other administrative duties. That is a lot for one person to take on!
I'm not trying to make excuses for the warehouse manager in your story, but I can easily see how someone could forget what they're supposed to be doing in a position like this!