we know that hunter and joe shared a bank account, where did the money going into the account come from?
we know that hunter paid joes bills (something that was illegal to begin with, not to mention the tax implications for joe)
we know that emails suggest joe got money. did he? we don’t know that.
we know that joe’s family members profited from his office, unethical on it face, possibly a violation of ethics laws involving public servants, possibly emoluments issues, how involved or knowledgeable was joe?
investigation is not only warranted, its practically mandated