"But that still can't precisely determine the kidnapper's location, right."
"Hmm, so after I arrived, I asked someone for help and sent out several trains, but the whistle sounds were different. Alice Smith heard different whistle volumes from Mason Wright's mobile phone, and you can differentiate using sound frequency. The loudest sound is the closest to the kidnapper's location. Then, based on the train's speed and the time it departed, you can roughly calculate a distance. That way, it was more precise for me to find Hankie Adams."
After listening, Alice Smith involuntarily sighed in relief, only feeling that Shane Winchester's way of thinking was indeed different from ordinary people. He could even detect and use such small details like whistle sounds.
"But I noticed, after Hankie returned... his attitude toward Mathew seems... seems not very good." Alice was somewhat worried.
