Like a storm, they flew to the professor's residence. Without waiting for the jeep to stop completely, Shahryar jumped out and stood directly in front of the door. Seeing the seal still intact, he felt relieved. The inspector joined him, stepped forward, broke the seal, and opened the lock. As soon as he opened the door, Shaharyar immediately rushed towards the professor's bedroom. He first looked at the nightstand. Seeing the lamp still on it, he breathed a sigh of relief. He stepped forward and picked up the lamp. It felt heavier than usual. Nasir also entered the room soon after. Shahryar opened the lampshade and separated it. Now only its lower part remained in his hands. Just as he expected, a small, thick rod with a coiled-like spring copper wire was attached inside, a little distance from the bulb. One end of this wire went into the bulb holder, while the other end went inside the lamp where the circuit was connected to the internal power supply. Now Shahryar turned to the Inspector and asked, "Do you know what this is?" "Brother, I'm no scientist," Nasir said, shrugging helplessly. "This is a modified form of a Tesla coil," Shahryar told him. "Tesla coil? What is that?" the Inspector asked in surprise. "This device was first invented by an American scientist, Nikola Tesla. In simple terms, without going into technical details, understand that this device can not only produce high-voltage electricity but can also transmit it wirelessly to anything nearby," Shahryar explained. "But Sherry, how is this possible? How can electricity be transmitted without wires?" the Inspector was perplexed. "This is entirely possible, my dear, and Tesla invented his device to prove it," replied the detective businessman. "But even then, how on earth did the professor get electrocuted by this?" The inspector was still confused. "Through his stick," Shahryar replied. "You remember the coiled wire we found inside the stick?" he reminded the inspector. "Oh yes, I got it. It served as a receiver for the deadly current," said the inspector in an astonished tone. "It means that the lamp was probably gifted to the professor by someone close enough that he also had access to his stick," he added. "It means that whoever gifted the lamp is my man." "That's for you to know," Shahryar teased. "I have solved the puzzle and placed it in front of you. If you still can't catch him, it's better for you to resign and sell snacks for your living."