7
If I had to bet! - I’d guess it might have been a commonly prescribed ADD drug such as Ritalin. While controlled, it is legitimate if prescribed, and would probably be unmentioned (to protect Marius’ privacy.That is in line with what I would expect. Cocaine, cannabis, and MDMA are all popular substances among young people (at least in Europe and North America) and many people abuse all of them concurrently. I am glad no traces of alcohol were found in his body (as alcohol can be dangerous in particular when used in combination with cocaine and MDMA as far as I understand).
I wonder, however, what the fourth (unnamed) active substance was. Hopefully it is not something even more serious than the usual "recreational drugs" mentioned above.