Yes. The Quran says that whoever kills a soul unjustly, it is as if he had killed all mankind (5:32), and forbids killing the soul that Allah has made sacred except by right (6:151, 17:33). The Prophet ﷺ said that blood shed is the first matter judged between people.
Narrated `Abdullah:The Prophet (ﷺ) said, "The cases which will be decided first (on the Day of Resurrection) will be the cases of blood-shedding
Arabic text (with chain of narrators)
حَدَّثَنَا عُمَرُ بْنُ حَفْصٍ، حَدَّثَنَا أَبِي، حَدَّثَنَا الأَعْمَشُ، حَدَّثَنِي شَقِيقٌ، سَمِعْتُ عَبْدَ اللَّهِ ـ رضى الله عنه ـ قَالَ النَّبِيُّ صلى الله عليه وسلم " أَوَّلُ مَا يُقْضَى بَيْنَ النَّاسِ بِالدِّمَاءِ ".
This is general information, not a fatwa. For your own situation, ask a qualified scholar.
Questions about halal and haram
Is killing a person haram?
Yes. The Quran says that whoever kills a soul unjustly, it is as if he had killed all mankind (5:32), and forbids killing the soul that Allah has made sacred except by right (6:151, 17:33). The Prophet ﷺ said that blood shed is the first matter judged between people.