[thr0waway1239]

Good story, but probably not one answering the question. You only regret something when you realize you ignored all the bad signs initially. In this case, your feeling was probably vindication and not regret.

Besides, if this person was only there for 3 days, its almost as if the whole episode didn't even happen :-)

[EliRivers]

Good story, but probably not one answering the question.

He said: "I'm trying to find out what can go wrong while hiring​ a developer."

I said: "What went wrong? One person permitted to discount everyone else's opinion and hire a clearly bad candidate anyway, on the grounds of their own personal prejudices."

[rikkus]

[s]he regrets the hiring of the developer. And if they're hired at all and then leave quickly, that's an awful lot of money (even it was all in people's time) wasted.