C286 Unexplained

Yu Jingyan is the leader of a technology company, his drone is much stronger than normal goods. If it was modified again, he should be able to achieve the goal of killing others, so it is reasonable for Lee Zhongyuan to quarrel with the staff member and kill the staff member. However, from the looks of the staff member's corpse, the wound looks like it was caused by an unmanned aerial propeller