Seeing an Unknown Slaughtered Person
Scholars have said that if one dreams of a slaughtered person whose slayer is unknown, it might represent a person who has innovated a heresy, or has been burdened with false testimony, an unjust ruling, or a false judgment.
Per Ibn Sirin's Muntakhab al-Kalam fi Tafsir al-Ahlam
Note: These are traditional scholarly interpretations (ijtihad) drawn from a specific classical source — not a binding religious ruling, fortune-telling, or a prediction of the future.