Shock twist in case of boy who ‘slaughtered his entire family’ as chilling poisoning claims emerge | The Sun

A TEENAGER who allegedly slaughtered his entire family previously tried to poison his stepmom with peanut butter, court docs reveal.

Mason Sisk, 19, is accused of shooting his parents and three younger siblings aged six, five and six months in Elkmont, Alabama in 2019.



Before allegedly executing his five family members, Sisk had tried to poison his stepmother by putting peanut butter in her coffee – knowing she was allergic, according to new court files.

The documents also allege Sisk had been threatening towards his dad and forceful with his three younger half-siblings, News19 reports.

He was also accused of stealing jewellery from his stepmother and grandmother. 

Sisk is said to have carried out the shootings after finding out his stepmom, 35-year-old Mary Sisk, didn't give birth to him, a family member said.

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According to Sisk's cousin, in the weeks leading up to the alleged September 2019 shooting the then 14-year-old had been "exhibiting problem behaviour at school" and burning animals alive.

He then shot his dad, John Sisk, 38, his stepmom Mary, and his three young siblings, Kane, Colson and Aurora, before ringing 911 and telling cops he had been in the basement of his home when he heard gunshots.

Limestone Sheriff's Office spokesman Steven Young said: "He ran out the door and there was very little other information given."

Mr Young added there were "discrepancies" in the boy's statement, and when confronted by officers he "admitted to shooting the five family members".

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Sisk also helped police find the handgun he is thought to have used – which was found tossed on the side of the road near the home.

Cops said it had been in the house illegally.

Sisk's dad, John, had sought full custody of his son in 2010.

He said the boy's mother, who died the following year, had not been in her son's life since 2008 telling a court she struggled with drink and drugs.

He was granted emergency custody after she was found dead.

Sisk's stepmom, Mary, originally from New Orleans, was a "well-liked" special education teacher at Mountain Gap Middle School.

According to reports from 2020, Sisk "had not shown any sign of remorse" for the alleged crimes.

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Sisk faces one count of capital murder of two or more victims, and three counts of capital murder of a victim under the age of 14.

He will appear in court on August 12 for a pre-trial hearing. 

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