In this chapter:

(1) The term “designated person” means an immediate family member or someone similarly situated, as defined by the Attorney General.

(2) The term “immediate family member” means a parent, parent-in-law, grandparent, grandparent-in-law, sibling, spouse, child, or step-child of a murder victim.

(3) The term “victim” means a natural person who died as a result of a cold case murder.

(4) The term “murder” means any criminal offense under section 1111(a) of title 18 or any offense the elements of which are substantially identical to such section.

(5) The term “agency” means a Federal law enforcement entity with jurisdiction to engage in the detection, investigation, or prosecution of a cold case murder.

(6) The term “cold case murder” means a murder—

(A) committed more than three years prior to the date of an application by a designated person under section 60901(a) of this title;

(B) previously investigated by a Federal law enforcement entity;

(C) for which all probative investigative leads have been exhausted; and

(D) for which no likely perpetrator has been identified.