Law enforcement across the globe use semi-autonomous technology to do what humans find too dangerous, boring, or just can’t. This week, the Cleveland Police had a few nonlethal ones on hand at the Republican National Convention. But even those can be outfitted to kill, as we saw in Dallas earlier this month when police strapped a bomb to an explosive-detonation robot, and boom: a non-lethal robot became a killer. If that thought scares you, you’re not alone. Human rights activists worry these robots lack social awareness crucial to decision-making. “For example, during mass protests in Egypt in January 2011 the army refused to fire on protesters, an action that required innate human compassion and respect for the rule of law,” said Rasha Abdul Rahim of Amnesty International in a statement last year arguing that the UN should ban killer robots. More than a thousand robotics experts, including Elon Musk and Stephen Hawking, signed a letter last summer warning against machines that can select targets without human control. We wanted to find out just how many of these things are in use around the world. But law enforcement isn’t exactly forthcoming about the topic, so this list is not exhaustive. Here’s what we found.