Are you new to your interest in finding alternative accounts? Yes, they are indeed owned by the same person, but they are not involved in the same company at the same time. You can see that two accounts with a red tag have not been active for a long time.
But the fact that the third account is still participating in the bounty does not prove its guilt. Or can you provide tables involving three accounts at once?
This is a common practice among bounty hunters. Do not be surprised. Every time someone catches them cheating and they get a negative tag, they start a new account.
But one person's participation doesn't break anything, even though we know their past.