This happened and I'll never forget the day. Me and my two friends decided to go check out an abandoned house that no one lived in. We were on our way when we saw another abandoned house and wanted to check out that one. We grabbed our flash lights and walked in! (It was 10pm) It had a lot of spider webs and the floors were very creepy. We walked around a little bit and we heard some noises coming from the basement. Me and one of my friends were scared but my other friend said that it was probably nothing and it might just be rats. She found the basement door and it creaked when it opened. She walked down there. It had been 10 minutes when we heard screaming! We jump and run towards the basement. We shine our flashlights on the stairs and there is our friends with a knife in her chest laying on the stairs dead. We run out of the house and get in our car, we lock all the car doors and call 911! They come to the house and search the basement! But to there surprise, there is no one there. But are friend is still laying on the stairs dead. To this day the cops have never found out who the person or thing was that killed our friend. I was about 14 years old. Now I'm 16. I will never forget that day. I still have dreams about it.