Yours sounds like the final sentence of a letter or something, Inaba-chan. I think we might need to find out more.

[ They were locked out of trying the quest again, so that was right out, but if different people were getting different bits of information... ]

We'll have to look for everyone who completed this quest and put it all together. That might explain more, because there are a few reasons why someone would want to fake their death, but I can't say for sure with only what we know. Perhaps they're trying to escape their old life and forge a new identity on some remote planet, perhaps they want to cast suspicion on the new boss, or perhaps it's just insurance fraud?