As stated in the title, one of my coworkers is rarely in the office due to medical reasons. They do sometimes log on from home if they're feeling up to it, but their actual time spent in the office itself is maybe a third of the year. This coworker is also one of our support staff, and thus is somewhat important and it affects everyone else when he's absent.
I can tell my manager is getting sick and tired of the situation and I know that firing this guy would be a slippery slope due to his condition. Is there potentially a reason in which this guy could be let go without it turning into a legal matter?
I ask because it seems like a lot of my other coworkers are getting tired of this as well. But I realize this isn't really my business and is something my manager will have to take care of. My question is out of curiousity.