Dream About Murder And Spectatorship

I was in my apartment with my mother and so there was a staricase. Y'know how it would lead to a second floor? Well halfway on the stairway there was an apartment connected to the stairway and then to the second floor. It looked weird and idk how to describe it but I know what I saw. I witnessed a gruesome murder and it felt like I was beside the murderer who was murdering the woman. It was gruesome really, this person was stabbing this poor woman and the apartment was dirty like an NYC condo or smth. She was killed in her doorway when she opened the door for the murderer. I felt like I spectator, I was just a spectator and I didn't feel helpless, but I did feel sorry for her. There was just nothing I could do and I just let it happen. Even if i wasn't involved, I then ran out the apartment complex and I ran down the street. It was cold and in the middle of the night, I was just running on the street in summer clothes. There were these group of bikers and I hopped on one of their bikes and took off. . I think police did show up there and I looked back but I kept running. What I do remember is I was in the living room standing as I saw this person going up the stairs form outside my window and then I saw them go up to the door and I sensed trouble so I went outside and that's when I became the spectator of this crime. The woman didn't look familiar. No one looked familiar in the dream except for my mom in the beginning. She didn't say anything or do anything other than be in the apartment the entire time, I just sensed she was there and I looked to her once in the dream but that was just at the very beginning. I also remember something more significant. I remember that the lady who was murdered had a number 4 on her door. So my girl apartments, the odd numbers are at the bottom and even numbers are at the top but this apartment was in the middle of the stair thingy so it said 4, which made sense but didn't. In this dream, our apartment number was still 3, but since the door was 4, I for some reason, assumed the door on the second floor would be 5, not 4 or 6 which was odd. Idk how I would've gotten that wrong in the dream, it's common sense irl to me. I never saw the murderer face either but I did see the woman but her face was unrecognizable...it's just I don't remember her face but she had a face or maybe she didn't..it was hard to tell but she was screaming thats for sure. The bikers bikes were also black and I remember when I got on that we drove through a green light, not red and that was at the end of the dream. That's all the extra info I remember about the dreamI didn't know the gender of the murderer, I didn't even guess it cause it didn't matter who it was murdering the lady. I do know this other detail that the biker I hoped in the bike with was a guy and he was warm when I hugged him from behind like REALLY warm, almost like an oven. I felt such comfort with this strange man I never met before. He seemed around my age 18-19 maybe 20. Young guy but didn't see his face, he had a bikers helmet on.Okay ONE more thing I forgot to mention. The lady apartment, like at a distance, it looked like a box rather than an official apartment suspended in the air by these wooden planks and it didn't look sturdy, I wouldn't feel safe in there. But the apartment looked like a house on the INSIDE, not outside. It was dirty, but it was a lil cozy and shit. I remember the murder being so gruesome and it shocked me my brain could make up that, there was blood, splatters everywhere, her yelling and screaming. She wasn't fighting back, there was no need to. I didn't care about the woman but there was a part of me that wanted to see what she looked like but I don't recognize her face, her...anything at all.