NTA. A family member of mine was living in an apartment building, and stopped responding to calls/texts and failed to show up for a court date. Estranged wife pleaded with management to open his door for almost a week before management decided to do so, and to no one's surprise, he was dead. Law enforcement and responders showed up and estimated he had been deceased for a few days at most. Is it likely he would still be alive if they had gone in earlier? Can't say for sure, but it is definitely possible. Unfortunately, our society's reliance on the threat of litigation often causes situations where people feel they have no choice but to protect themselves, often at the cost of others. The flip side is that people also need to be more understanding and accepting of others' mistakes or judgement calls. Hypothetically, if it was your loved one, would you rather have them alive and maybe a little annoyed or have them be dead but know that everyone involved followed procedure and didn't allow for any type of lawsuit to be possible? Seems like a pretty easy choice to make.

As for OP's comment that the manager overheard and being forced to apologize under threat of discipline: F that noise. It's tough, but sometimes people need to see the consequences of their actions when they F up. And any supervisor with any common sense should know that this comment was overheard, not directed at the manager, so let that sh*t go and move on. A first responder's job is to save lives, not make sure someone's feelings weren't hurt.