What does it mean to dream about someone killing themselves in front of you?

I just had a dream that I was walking at someplace, then as I was walking i saw this Asian lady just walking around suspiciously. She was pretty far away from me.But i kept walking and looking back. The last time I looked back she had a gun In her hand about to shoot her head. I didn't want to see so I looked away and I kind of looke back and all I heard was a hot. there was blood all over. I wasn't even close to her when it happened and a little bit of blood came towards me. I also don't even know who that lady was. What could this mean? I'm so freaked out I've never had this kind of dream before.