OTB claims to have defused Marl day 2 and Marl did confirm it. There is not really much to say about his reads, because they are almost non existent or not involving Illuminati.
Illuminati Defuser cannot kill and we had 2 deaths this night. Fakeclaiming it would be extremely risky having it be a gambit on Eevee having to have defused Marl the night he died and Agents being able to see that he fakes his claim. It would also not really benefit him to do so as he’d be more “confirmed” if he doesn’t fake it.
I have a greencheck on OTB night 2, so the only way this could happen and OTB still be Illuminati is if Isaac tailored OTB. Isaac would in this scenario only have OTB left as ally, so it is not out of the realm of possibility, but in this scenario I would also see Isaac forgetting or not having time to use the ability. (he’s too noob )