Murder by shooting someone down in cold blood(noun)
WordNet. Princeton University. 2010.
Use "shoot-down" in a sentence
"For example, the 9/11 Commission concluded that Cheney issued the first air force shoot-down order on the morning of September 11, 2001—apparently before he had spoken to the president."
"If anything, the pace of innovation is even faster in the military than in the civilian world, and as better look-down, shoot-down capabilities have come on line, they have been systematically layered and squeezed into the aging airframe of the F‑15."
"Today the fight has moved beyond visual range, into the realm of electromagnetic waves*, and involves what fighter pilots call “look-down, shoot-down” capability."