If Quintana indeed gets caught up in this his story would be an incredibly sad fall from grace.
I agree with
@hrotha though, whenever these sort of cases actually end up delivering a big doping scandal we usually know right away. Like, I wasn't yet following the sport when there were new doping cases on a weekly basis but in the last few years doping stories either went:
"This guy or that team was doping, here is the irrefutable prove"
or
"There are some indications that someone might have done something illegal and that's the only thing we ever find out"
In the 2nd case we then go on about whether this could develop into a major scandal but the reality is, if it's really a major scandal we wouldn't have to discuss it. We would already know.