Why did the scowrers gather in MC.Murdo Lodge how where they caught by the police

McMurdo and McGinty speak about the trap they are setting. McGinty frets over whether or not McMurdo has already told anyone anything. He wonders if Morris is involved; McMurdo tells him it is unlikely, but they have to focus on Edwards right now anyway. He then proceeds to explain how the plan will work: Edwards comes to the house at ten that night; the Freemen hide while he puts Edwards at his ease; he then jumps on Edwards and holds him until the others rush in. McGinty likes the plan and compliments McMurdo.

At the house McMurdo prepares his weapon and tells Scanlan, who confesses he does not like these bloody deeds, to stay away from the house that night.

The men arrive and wait; bloodlust is in their eyes. Three knocks sound on the door and McMurdo hushes them to be quiet and goes into the other room. They hear him talking to a man and anxiously await their cue.

McMurdo appears at the door and the men see his fierce eyes, firm expression, and glow of power. He announces that he is Birdy Edwards. For ten seconds there is silence, then several rifles crash through the glass windows. The police surround the men and point guns at them; the irate McGinty can do nothing.