Killing a Person
Scholars have said that if one dreams of killing a person, it might indicate committing a great deed. It was also said that it might signify salvation from sorrow.
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.