The Familiar Stranger (short story)

"I just want to know one thing. How did you pull this off?" As he was sitting there I noticed dry blood covering his face from the glass. Those demonic eyes sent shivers down my spine as he looked at me. "You see Miss Clark, your sister was quite the easy target. She asked me for a glass of water as her throat was sore. Being the person I am, I was easily trusted." He stopped talking and lightly chuckled. "Silly girl" he stated with amusement. "I may or may not have slipped something in her glass to make the process easier for me. As I watched her gulp down the liquid, I knew there was no turning back."