It's unlikely that you'll find out what you need to know within one, three or even five interviews. People are a lot more complex than that, and dragging them through interview after interview is wasting their time and yours.

The problem is that we treat employees like homogeneous cogs when they're living people, and the REAL problem-causers are typically clever and manipulative enough to avoid exposure for months or even years.

There's no management training to deal with the fallout from a toxic employee, but they cause vast amounts of damage and, because they are expert manipulators, tend to rise to senior positions where the damage permeates extensively.

I don't know what the solution is (other than replacing HR with actual psychologists), but accepting that people are human with complex needs is a start.