Fun fact.
In 1975, the CIA unveiled the "heart attack" gun.
It operated on battery power and shot a dart made of ice, which contained a deadly shellfish toxin. Once the dart penetrated the body, it would dissolve, leaving just a tiny red mark as evidence.
https://video.nostr.build/d5ef5250d44e1ff8be1d162694fee406eebe96ac2ae69465f0ef1c35b93b4497.mp4