A man and his son allegedly thrashed a DHBVN junior engineer and held a foreman captive for over an hour after the two discom staffers pointed out power theft at their house in Durga Colony on Monday. JE Sanket Kataria and Adesh were checking a three-storey building owned by Satbeer Thakran, when they saw that an external cable was connected to the MCB. Satbeer rents out 50 rooms in the building. As the staffers pointed this out and started making a video, Satbeer and his son started thrashing them with pipes and sticks, the JE said.