οἱ ἐκ τῆς συνωμοσίας
From LSJ
εἰς ἀναισχύντους θήκας ἐτράποντο → they resorted to disgraceful modes of burial, they lost all shame in the burial of the dead
Dutch (Woordenboekgrieks.nl)
de samenzweerders Thuc. 6.27.3 = οἱ ἐκ τῆς συνωμοσίας Plut. Ant. 13.4.