Most cars have a common power soource for the injector(s).
If you tie into that and kill the power to the injectors you effectively kill the engine immediately with no fuel loss.
It would be the same as if you had pulled the injector connector loose.
I am not sure whether or not it would set a code on your engine, but it won't set a code on the '95 & older Metros.(at least not on mine)
Anyway, just a thought on a different yet similar way to kill the engine for EOC.
TTFN
S.