The officer said, "We can provide you with drones, civilian versions of course. The professional versions not only cost more, but we also have limited stock. Besides, although you are some distance away from the killer, I think you also wouldn't like to have such a person as a neighbor. It's almost inevitable that you'll run into him outside."
The officer continued, "We are glad that the survivors are forming their own survival strongholds; there might even be room for collaboration in the future. Here is a list."
Maya took a piece of paper that listed: Telescopes 2, Walkie-talkies 4, Satellite phone 1, Gas masks 2, Drone 1.
The officer said, "There's more on the back. If you can help us locate the killer's position, the items on the back are yours."
Guns 5, Bullets 300, Bulletproof vests 5, Canned food 50.
The officer said, "The front side is an advance payment. If you can't find the killer, consider it a gift for our meeting."