Je was op zoek naar: decedent (Engels - Japans)

decedent
死

all suggest the decedent's manner of death, is...
索痕が見られることから この遺体はー

mark sayle, the decedent's son, is here to talk to you.
息子のマークが来てます

judging by the length of the hip axis, the decedent was female, of mongoloid descent.
股関節軸の長さから判断すると 被害者は女性ね モンゴロイド系で

the decedent looked great had the body of a man half his age, but his brain was full of holes.
遺体は若者の体を持ってたが 脳はスカスカだった