; (4) by striking However, a juvenile who is alleged to have committed an act after his sixteenth birthday which if committed by an adult would be a felony offense that has as an element thereof the use, attempted use, or threatened use of physical force against the person of another, or that, by its very nature, involves a substantial risk that physical force against the person of another may be used in committing the offense, or would be an offense described in section 32, 81, 844(d), (e), (f), (h), (i) or 2275 of this title, subsection (b)(1)(A), (B), or (C), (d), or (e) of section 401 of the Controlled Substances Act, or section 1002(a), 1003, 1009, or 1010(b)(1), (2), or (3) of the Controlled Substances Import and Export Act ( 21 U.S.C. 952(a) , 953, 959, 960(b)(1), (2), (3)), and who has previously been found guilty of an act which if committed by an adult would have been one of the offenses set forth in this paragraph or an offense in violation of a State felony statute that would have been such an offense if a circumstance giving rise to Federal jurisdiction had existed, shall be transferred to the appropriate district court of the United States for criminal prosecution. ; (5) by striking social background of the juvenile and inserting social background of the juvenile; the juvenile’s prior exposure to adverse childhood experiences, childhood trauma, and involvement in the child welfare system; ; (6) by striking behavioral problems and inserting juvenile’s behavioral problems; the rehabilitative potential of the juvenile within the juvenile system; and the best interest of the child ; (7) by striking leadership role and inserting juvenile’s level of participation in the offense