Wiktionary
n. (plural of smoking gun English)
Usage examples of "smoking guns".
Had not Alain himself, one of his sworn brothers, died under Roland's and Cuthbert's own smoking guns?
With their battle-hardened eyes and smoking guns, the two who had rescued him and his crew looked more like commandos than ocean scientists.
Spears had disappeared into the dark trees and Sharpe, pulling his clumsy sword free of the scabbard, went round the flank of the British line, in front of the silent, smoking guns, and the slope of the small ridge was horrid with French dead.
Okes had seen Herrick watching him, and his eyes had strayed past to the smoking guns in the battery which he had left to fend for themselves.
But too often, what civilians like you think are 'smoking guns' very often are so flawed they can't be used as evidence at all.