[JackOfVA]

IIRC, a victim must die within a year and a day in order for the death to be ruled a murder.

That was the rule at common law, but many states have changed it by statute.

[P-Marlowe]

That was the rule at common law, but many states have changed it by statute.

The shooting was in DC, so federal law would apply. Unless there was a specific statue changing the rule, the common law rule would still apply. Regardless, I don't think that there is a 21 years and a day rule in any state.

FWIW, California changed it to 3 years and a day.