Certainly what happened afterwards confirms this charge, since at a later date after the general restoration of order and a return to security, Severus richly rewarded the rest of his generals. Laetus was the only one he executed, apparently remembering the treachery at Lugdunum.
Herodian. History of the Empire, Volume I: Books 1-4. Translated by C. R. Whittaker. Loeb Classical Library 454. Cambridge, MA: Harvard University Press, 1969.
Herodian. History of the Empire, Volume II: Books 5-8. Translated by C. R. Whittaker. Loeb Classical Library 455. Cambridge, MA: Harvard University Press, 1970.
