The ruling on one who works in a company whose source of funds is forbidden

Question:
May Allah reward you. One of the individuals worked at the company, and after verifying the company, he heard that the source of this company's money is forbidden. Its owner was a minister in one of the Arab countries, and it is said that he stole the state's money. After leaving his position, he opened several companies, including this one. Some people say that, while others say it is a false accusation with no basis. That is merely because the company has become one of the best companies in the market, and this is what the competitors say so that the company loses out and the volume of transactions with it decreases. The employee at the company asks: If the money is actually stolen and is originally state money, is the money we receive from the company forbidden?

Answer:
If he knows that, he does not assist. As for if he does not know, there is no action based on rumors. As for if he knows that the company's funds are forbidden, he does not work in it.
Okay, does he have to leave the job?
The Shaykh: If he knows. As for rumors, they are of no use.
The rumors are of no use?
The Shaykh: No, no.