In science, you don't need to explain how/why something happens, only reproduce and prove THAT something happens.

We know that people die or are jailed. We can definitely see patterns that group those people together. Everything points to a single explanation, but regardless if that is proved or not, the effects are black on white.

I don't have to understand/prove weak forces or gravity to state that 100 of 100 apples dropped fall to the ground.