First I will explain the principle of the substantive road, and then the money road.
Each criminal organization has people, actors, who work at committing the targeted crime as such. So there are going to be roles, statuses, for each person, of course. Some of them will commit motor vehicle thefts, others will engage in intimidation, and others will handle the drug trafficking. Each one will have a clearly defined role.
However, the profits generated by drug trafficking will often involve other people, completely outside this. They are the ones who will control the money, the caches of money, who will buy the drugs and conduct the transactions. Certain connections are made, are established. But I would say that in my experience, the drugs are rarely directly connected with that money.
That means there are two roads to be proved. They are not the same actors, and that means it has to be proved that the profits generated by the property obtained by crime, or the criminal activities at least, were used throughout, whether the money is seized during the operation or at the end of the investigation. These are the difficulties that are often encountered in organized crime investigations, of course. The specific characteristic of a criminal organization is that the two roads never run parallel in this regard.
Does that answer your question?