; or (D) a prosecution by the United States is in the public interest and necessary to secure substantial justice. (2) Rule of construction Nothing in this subsection shall be construed to limit the authority of Federal officers, or a Federal grand jury, to investigate possible violations of this section. (e) Statute of limitations (1) Offenses not resulting in death Except as provided in paragraph (2), no person shall be prosecuted, tried, or punished for any offense under this section unless the indictment for such offense is found, or the information for such offense is instituted, not later than 7 years after the date on which the offense was committed. (2) Offenses resulting in death An indictment or information alleging that an offense under this section resulted in death may be found or instituted at any time without limitation. . (2) Table of sections The table of sections for chapter 7 of title 18, United States Code, is amended by adding at the end the following: 120. Killing of law enforcement officers. . (c) Flight To avoid prosecution for killing law enforcement officials (1) Offense Chapter 49 of title 18, United States Code, is amended by adding at the end the following: 1075. Flight to avoid prosecution for killing law enforcement officials (a) Offense It shall be unlawful for any person to move or travel in interstate or foreign commerce with intent to avoid prosecution, or custody or confinement after conviction, under the laws of the place from which the person flees or under section 1114 or 1123, for a crime consisting of the killing, an attempted killing, or a conspiracy to kill a Federal judge or Federal law enforcement officer (as those terms are defined in section 115), or a federally funded public safety officer (as that term is defined in section 1123). (b) Penalty Any person that violates subsection (a) shall be fined under this title and imprisoned for not less than 10 years, in addition to any other term of imprisonment for any other offense relating to the conduct described in