Of course the recording device was powered by battery. As for why Gloria had it, she always brought it in case there was a pervert in the past so that she would be able to use it against him. Fortunately, she was not that much of a beauty or this device might have been put to use since a long time ago.
Hans had no other choice but to contact his superior and Gloria played the recording. At the same time, the voice of Officer Agus second scream could be heard from their back. It seemed that the officer liked the taste of getting electrocuted and hadn't had enough just now.
The superior listened carefully and even though he didn't say anything, they could guess that he must be angry.
"I'll take care of it. You stay there."
"Yes, Sir."
Hans took his walkie talkie then looked at William. "How did you do that?"
"It's not me but her," William said amusedly. "Anyway, please arrange for another official to come. We're going back to rest."