I would imagine that God could prevent all of the evil in the world, but I think the only way he could do that would be to entirely wipe the planet clean of all living things. Evil is an outgrowth of God's permissive will in allowing man to do as he pleases. Out of that evil God can work everything to his Glory and work everything to good. Thus both good and evil are foreordained. Indeed, if God does not foreordain an event, it cannot occur. God has declared the end from the beginning. Thus "He Knows What Evil Lurks" and he will work that evil for good. We have his assurance on that one.
Do you believe that God did not foreordain these girls fate? Do you believe that events like that can possibly happen if God really, really, really doesn't want them to? Do you believe that God was powerless to prevent these acts? Or do you believe that God allowed them to occur, knowing that ultimately it will work to his glory?
Let's say I take my mothers favorite crystal decanter to the top of a building and through it off the roof. Are you saying that I could go home and tell my mother that I actually didn't cause the decanter to break, the concrete sidewalk it fell on caused it to break?
I engineered the taking of the decanter, I set in motion it's flight by throwing it off the roof, yet somehow I can get away with saying I did not "cause" the decanter to break? God engineered this situation of the meeting of these girls and their murderer(s), God set in motion the limited number of the girls lives, yet somehow God can get away with not "causing" these murderers?
Do you believe that God did not foreordain these girls fate?
Are you asking me if I believe that God knew these girls would be murdered or do I believe that God engineered the exact events that would lead up to and involve their murder?
Do you believe that events like that can possibly happen if God really, really, really doesn't want them to?
No.
Do you believe that God was powerless to prevent these acts?
No.
Or do you believe that God allowed them to occur, knowing that ultimately it will work to his glory?
What exactly does the phrase “God allowed them to occur” really mean anyway? God turns a blind eye? Like a policeman at a reggae concert who see people smoking dope but doesn't arrest them? Either God engineers every single event or He doesn’t, right?
This is why Charles Spurgeon, the London pastor from 100 years ago said,
I believe that every particle of dust that dances in the sunbeam does not move an atom more or less than God wishes – that every particle of spray that dashes against the steamboat has its orbit, as well as the sun in the heavens – that the chaff from the hand of the winnower is steered as the stars in their courses. The creeping of an aphid over the rosebud is as much fixed as the march of the devastating pestilence – the fall of . . . leaves from a poplar is as fully ordained as the tumbling of an avalanche.
So then, did or did not God engineer the murders of Holly Wells and Jessica Chapman? And, if He did, and in the end it does indeed serve to glorify Him, God would not only have "allowed" evil to happen and "somehow" been glorified because of it, God in fact would have designed, built and carried out evil for the precise purpose of glorifing Him.