Dream About Someone Getting Killed

The main characters of my dream, who were doing an interview on a balcony, heard noises and went up to see what was happening. A killer ,who was unknown, secretly got into a room of two people that he wanted to kill. It was a personal matter to him. Someone else put themselves in front of the victim, who he was holding, to protect them. He told her to shoot herself in the mouth. And she did. Nevertheless, he still killed the other victim and didn’t stand on his word. Afterwards we found ourselves outside. But this other person who I was with right now wanted to check out what had happened due to their conscientiousness. I don’t remember who this was. It was either my sister or a friend. So we try to get inside of this building. By entering through the neighbouring building and going up with the lift. On our way, we saw two people coming from the opposite way. But we don’t say anything and go on. We keep everything a secret. On the last minute, when this person I am with (either my sister or another friend, I don’t know) goes to go up the last set of stairs and turn around to the said corridor where murder took place, I shut down. I don’t come up with her and actually want to tell her not to go. Since this is obviously a dangerous situation. But I can’t say anything out of fear the killer might still linger around and hear. And he does. The unknown person (sister or friend) goes up and asks something about what’s happening. The killer is very cold-blooded and gives off a thousand lies on what he’s doing up there and doesn’t even stutter. I didn’t see him. I was just anxiously waiting at the begginning of the stairs and not even on his level. But I was just scared that something might happen anytime soon. The killers lies, that I knew were curated, gave me the shivers and that’s when I woke up.