I didn't. Does a strict rule of law and enforcement of said law lead to no murders? No. Does it reduce the amount of murders that occur? Yes (see Singapore).
By that logic, and looking at the data [1] you should come to the conclusion that one should remove the death penalty, because Europe has less homicides compared to the US and does not have a death penalty. So there are actually less murders without death penalty.
Obviously, that conclusion is flawed, because the data also shows otherwise in some countries I guess - and just using the death penalty as data point is useless. There are way more factors in play that lead to murder.
I didn't. Does a strict rule of law and enforcement of said law lead to no murders? No. Does it reduce the amount of murders that occur? Yes (see Singapore).