I was assuming that would be due to all the noise. Otherwise it would seem like a pretty risky plan to call the cops and possibly have them get there before or right after you do, not allowing Walt to kill them all. That would leave him stuck with the possibility of the Nazis getting arrested and using their pull to threaten Walt to keep quiet by using his family against him. But I guess either way, it's risky.
[This message has been edited by Not Yet Dr. Ag (edited 9/30/2013 6:53p).]
[This message has been edited by Not Yet Dr. Ag (edited 9/30/2013 6:53p).]