Benjamin Elliott, 17 stabbed his twin sister, Meghan in the neck as she slept in her bed at their home - he later called 911 telling the operator 'It felt like a dream' View 5 Images Benjamin Elliot was found guilty of killing his twin (Image: Court TV)

Mystery surrounds the case of a man convicted of murdering his own twin sister as she slept in her bed. Benjamin Elliott had become "enamoured" with a survival knife given to him by his father, which he kept beside his bed at their Texas home. ‌

Just hours later, he would drive that very knife into his sister's neck twice and claim he did it while sleepwalking. In a chilling 911 call, Benjamin, then 17 can be heard saying: "I just killed my sister. Oh my God." ‌

He added: "I thought it was a dream. I took my knife and

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