Morgan Geyser and a friend Anissa Weier lured a fellow classmate into the woods during a sleepover in 2014 and stabbed their victim 19 times to appease the 'slender man' Morgan Geyser stabbed her classmate 19 times when they were just 12 years old (Image: AP)

A woman known as the ‘ slender man stabber ’ was free for 24 hours after she cut her ankle monitor off – because of a communication error with the police.

Morgan Geyser was one of two pre-teen girls who stabbed a fellow classmate in 2014 – when they were all only 12-years-old – to appease the ‘slender man’ meme , who they claimed they believed was real. Geyser and her friend, Anissa Weier stabbed a fellow classmate 19 times but miraculously she survived the attack.

The ‘slender man’ was named after a fictional horror

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