“Then why did you call her a twerp?”
“It’s just an expression.”
Drumson shook his head in mild rebuke, and said, “Tut tut!”
“Then I had a right to act on that assumption,” Bertha said. “She can’t stick me. Is that right?”
“Well, now, Mrs. Cool, that also depends. Your assumption of her guilt must have been a reasonable assumption, predicated upon an investigation of all the evidence. I believe you stated that a certain Sally Brentner turned out to be the guilty party?”
“Yes.”
“How did you discover that?”
“The police discovered it,” Bertha admitted with reluctance. “How?”
“The second letter showed that the woman must have been able to see what was going on in Belder’s office. Police decided that she must have been in an office across the street looking through the window into Belder’s office. The police stood in Belder’s office, looked across the street, and found there were only one or two offices the person could possibly have used for such a purpose. They knew the time of day they wanted to cover. She’s been a patient in a dentist chair.”
Drumson frowned. “But why didn’t you do that, Mrs. Cool? It seems to me it was the most logical method of trapping the guilty person.”