Creates a new federal rule allowing homicide prosecutions even if a long time passes between the act (or failure to act) that led to death and the victim’s eventual death. For ordinary prosecutions the timing between act and death no longer bars federal homicide charges; for cases seeking the death penalty the government must prove beyond a reasonable doubt that the interval was one year and one day or less. The rule only applies to acts or omissions that occur after the law takes effect and does not replace existing statute-of-limitations language in 18 U.S.C. §3282(a).