 Why was Halloween night chosen as the time for the rumble in the schoolyard?
There was Charlie Casale, getting ten dollars dimes, six dollars nickels and four dollars pennies for his father in the grocery store down the street. There was Mrs. Dolly Daniels, withdrawing money from her savings account again. The three bank robbers looked like triplets. The man who had first spoken herded the tellers, Mr. Featherhall and the customers all over against the back wall, while the second man stayed next to Mr. Anderson and the door. Except that in the trunk lid the owner had burned in 'The Scorpion' in big black letters you could see half a block away." "If I'm making just a quick stop—I never spend more than five minutes with any one customer—I always leave the keys in the car.
 Because the police would have a difficult time keeping track of so many children who were out.
 Because on that particular night, there were no police on patrol because of the recent issues with The Scorpion.  Because everyone was already dressed in disguise and not easily recognized.  Because the police would have a difficult time keeping track of so many children who were out.  Because the schoolyard was completely abandoned and they wouldn't need a lookout.