'Do you think that our law is effective at stopping crime?'
It depends on whose law 'our' law is. In the US murder is legal when performed by the state, so is torture, these activities are deemed not just illegal but wholly reprehensible in every other Western industrialized nation. In Saudi Arabia & other Sharia countries murder & torture are also legal, although in those countries the criminals also include homosexuals & rape victims.
The question itself is flawed, since it fails not just to contextualize 'our law', but also which crime or crimes are being affected: Different countries have different laws, they have different notions of criminality, they have different legal systems, their people have different rights. For example, statistically Switzerland, which has one of the highest proportions of guns per capita has one of the lowest murder rates, yet they have no death penalty.