The Shadow had left them alive, to testify against the crime ring.
But it's not though they've cracked one big crime ring.
The Shadow, to deal fully with this crime ring, must first know all.
When the trip turned to tragedy the crime ring quickly fell apart.
"The law would naturally not suspect you as head of the crime ring after such an episode."
The crime ring wouldn't use a "finger" who was only good for a single job.
Somehow, the crime ring had induced her to go to a place where she wouldn't be easily found.
There was no temptation to talk about the crime ring.
So Reggie talked with the real head of the crime ring.
There would be no use in trying to conceal the fact that the crime ring is moving.