This pic reminds me something from 40K's Throne of Lies.
"Brothers and sisters! Sons and daughters! We are free, united far from the reach of the hated false Emperor! I... I..."
He never finish the sentence. The fat man staggered, gripping the balcony's railings. The Red Sentinels moved as one, their rifles up and panning for threats. The cheering from the crowd was drowned in confusion. The Huntress smiled as she watched. The timing had been perfect. The venom delivered the very moment this false prophet dared to decry the God-Emperor. The crowd had seen it. The hololithic image feeds had recorded it, so the whole planet had witnessed it.
Now they knew the price of blasphemy and secession.
The digital weapon concealed on her gauntlet was only good for a single shot. One sliver dart rich with neurotoxin. The targeting laser was flashless and easily powerful enough to pierce the heretic silk robes. She fired it right in his spine, and none of the Red Sentinels were any the wiser. The high priest tumbled forward, and he pitch over the balcony's edge. He didn't scream as he fells, for he was already dead.
Cool. I read a short story by ADB the other week from the latest Horus Heresy omnibus. I was very impressed by his writing. I've searched for books by him but all I've found is Space Marine ones. I reckon he'd kick arse doing an Imperial agent novel.