Who killed my sister?

When I was little I’d sit by the window and listen to the rain fall softly against the window. I loved the way the raindrops would hit the window and then slide down, reuniting with other drops in order to create a masterpiece. I sat by the window every day to practice playing my guitar, to write songs, to do homework or just to relax. It was my favorite place in the world. Every night, no matter how late I came home, I’d always sit by the window, listen to the rain and relax for a couple of minutes before going to
bed. One night, after getting home from a party, I sat down by the window to listen to the rain, but this time there was no rain, just the sound of my sister’s blood dripping from her dead body.

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