Is informing a new CEO about the corruption of former employees, without revealing their identities, considered cutting off livelihoods, which necessitates accountability, or exposing injustice, for which the doer is rewarded?

If employees are known for corruption and injustice and have not repented, there is no objection to informing the manager about their situation to prevent their corruption and injustice. This falls under the category of changing an evil, offering sincere advice, and removing injustice, because concealment is for those who are not known for corruption. As for those who are known for it, it is recommended not to conceal their actions; rather, their case should be brought before the ruler. If the sin is ongoing, one must promptly denounce it. If one is unable to do so, it is obligatory to refer the matter to the ruler, unless doing so would lead to a greater harm. As for the sustenance of people, it is in the hands of Allah alone.