The military built a sci-fi heat ray deemed too legally toxic for actual combat, so naturally they loaned it to border patrol while quietly absolving themselves of liability.
https://www.koco.com/article/pentagon-dhs-tests-heat-ray-border-operations/74208385
KOCOPentagon grants DHS permission to test heat ray weapon for potential use at borderThe Pentagon has given the DHS permission to test a military-grade heat ray and develop tactics to potentially use it in operations at the southern U.S. border.