The new Time article seems to strongly suggest that Michael Brown’s official bio/profile contains false and deliberately misleading information.
Depending upon the specific fact pattern, there are several violations of federal law which may have occurred. If Brown offered false information in the required submissions for his current position, he may well have violated Title 18, Section 1001 which deals with false statements. Federal forms typically state that they are signed under penalty of perjury.
Simply firing Mr. Brown would not be appropriate under the circumstances. He should be prosecuted and then offered an opportunity to save his incompetent hide by testifying as to who coached him and conspired with him through the hiring process.
There are people serving lengthy terms in federal prison for far less.