All we can presume is they had some reason to believe there was something fishy. I have no idea what the investigation involved. All I wanted was verification:
"That was not about an investigation of Anavex Life Sciences, that has been announced."
I just wanted to know WHERE it was announced this was NOT an investigation of Anavex.
BTW: IF this had been an investigation of possible illegal activities in which employees of the company might be involved, we could say it was an investigation of Avonex. We simply don't know and it would be wrong to presume anything.