Deuteronomy 19:12

19:12 The elders of his own city must send for him and remove him from there to deliver him over to the blood avenger to die.

Deuteronomy 21:19

21:19 his father and mother must seize him and bring him to the elders at the gate of his city.

Deuteronomy 25:8

25:8 Then the elders of his city must summon him and speak to him. If he persists, saying, “I don’t want to marry her,”

tn The גֹאֵל הַדָּם (goel haddam, “avenger of blood”) would ordinarily be a member of the victim’s family who, after due process of law, was invited to initiate the process of execution (cf. Num 35:16-28). See R. Hubbard, NIDOTTE 1:789-94.