OK, I think that I need more information.
*What engine is in it?
*When you say that it won't shut off & there is a "sound" that the engine is still running, has anyone looked under the hood?
*Is the engine actually running?
*Is the starter stuck in and just turning the engine over?
Random Multiple Misfire just means that the engine is missing on random cylinders. This can be caused by a lot of things, plugs, wires, coil, cap, rotor, weak fuel pump, dirty fuel filter, injectors... and so on. These should cause the engine to want to stall rather than stay running. So if the engine is actually running I am thinking that you have more than one problem. Get back to us with the answers to the questions & we'll try to figure this out.