Can prayer change God's perfect plan?

[MellisaClarke]

I don't want to think of it like that.
What if police officers ignored murderous criminals, and allowed things to proceed as they were?

I believe God's plan is far deeper than the scenario you lay out.

You can't compare God to police officers, because police officers have limited abilities. On the other hand, God stopping us every time one of us tried to do something wrong, would mean we'd be like puppets and not people.  

But yes, of course God's plan goes much deeper than what any of us can know or say. I can only offer my very limited understanding.

I don't see why we can't compare God to police, as man was made in God's image.
What about government and presidents? What if usa government allowed murderous american criminals to go uncaught? 

In the scene above, government has a lot of power, and they have the power to do many things.

Yes, God's plan is deep. Prayer will connect us with God's mind one day.