When you are facing criminal charges of any kind, whether at the federal or state level, you are supposed to enjoy a presumption of innocence. That's the ideal. In reality, a person can suffer negative consequences of presumed guilt even as the investigation of the alleged crime is underway. That means that the need to protect your best interests may begin long before charges are leveled or you are formally indicted.
Every case is different and no one can guarantee a particular outcome. By engaging experienced counsel early it is possible to take more proactive steps to assure your rights are protected throughout the process. The aim should be to set the stage for the complete dismissal of the charges, mitigation of the effects if conviction occurs, or mounting a successful appeal.