Frog wrote:The largest problem is (as you note) how to identify the potential problem. The premeditated action would typically have a root cause as would the crime of passion; similarly, what would the difference be between someone who goes to rob a bank, but in the heat of the crime panics and shoots someone? They didn't intend to do so, but instead to have the gun to provide additional leverage. It is certainly a very complicated subject.
It begs the question why the bank robber chose circumstances that would allow for such a "crime of passion".
The "murder" might not be premeditated, but the circumstances are (especially having a loaded gun). If they'd made otehr choices our hypothetical bank robber would could have made other choices in their life which didn't require robbing a bank, and especially not murdering someone.
I think the roots of murder go further than planned/unplanned, there has to be a sort of mentality behind it (whether premeditated or impassioned) that leads up to events such as murder. And this mentality guides the choices we make.