येनाहूतः सह स्थितः प्रस्थितो हतभूमिमानीतो वा तमनुयुञ्जीत ॥ कZ_०४.७.२० ॥
yenāhūtaḥ saha sthitaḥ prasthito hatabhūmim ānīto vā tamanuyuñjīta
He should interrogate the person by whom the victim was summoned, with whom he stayed, with whom he departed, or by whom he was brought to the place where he was killed.
The 'last-seen' and timeline reconstruction method: identify and examine those who last interacted with the deceased or controlled their movements.