"The CIA's "heart attack gun" (officially a dart gun or non…

"The CIA's "heart attack gun" (officially a dart gun or nondiscernible microbioinoculator) was revealed in the 1975 Church Committee hearings. It fired a tiny frozen dart made of shellfish toxin (saxitoxin). The dart was so thin it left virtually no entry wound, and the toxin caused cardiac arrest while being nearly undetectable in an autopsy."