The boy, 14, put peanut butter in his stepmother’s coffee knowing she had a severe allergy and then went on to execute his whole family, including his half brother who was a six month old baby
A small town in Alabama, USA was shaken to the core after a teenage boy murdered his whole family in cold blood, shooting them all in the head. When he was sentenced the District Attorney said the boy was ‘scary as hell’.
It emerged during Mason Sisk’s trial that before the execution-style killings, he had tried to harm his special education teacher step-mum by lacing her coffee with peanut butter, knowing she had a severe allergy to peanuts. Prosecutors also argued that he had anger issues and had previously threatened the family.
He was sentenced to life in prison without the possibility of parole, which is extremely rare in cases which involve a juvenile defendant. It comes after news a nursery teacher drowned her partner’s four-year-old daughter in sickening attack.
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On the day of the horrific crimes, at around 11pm on September 2, 2019, Sisk, who was 14 at the time, called 911 to report a shooting. He initially told police responders that he had been in the basement of the family home in Elkmont playing video games when he heard gunshots. He said he ran outside to see a vehicle driving away.
However he later confessed to killing his entire family and led officers to the murder weapon – a 9mm pistol. Sisk had shot his father John Wayne Sisk, 38, his stepmum, Mary Sisk, 35, and three of his half-siblings – 6 year-old Grayson, 4 year-old Aurora and 6 month-old Colson – as they lay in their beds. It’s not known if his stepmother drank the laced coffee and had a reaction before he shot her.
According to the New York Post, during a pretrial hearing, an audio recording was played in which Sisk told investigators about a possible motive for the murders. “Yeah, they argue a lot, and I got fed up with it,” he was heard saying. “And the kids were going through a lot.”
However in 2019 Sisk’s cousin Daisy McCarty told WAFF she believed he carried out the killings after discovering Mary Sisk was not his birth mother. “He didn’t know any different of who his mom was. And they just recently told him, and I think that’s really what triggered the little boy, to be honest with you,” she said at the time.
His cousin also said Sisk had been misbehaving in the months leading up to the massacre by burning live animals and breaking into his school.
A report from a juvenile probation officer stated that Sisk “has not shown any sign of remorse” and hadn’t mentioned his family at all during his time in detention.
In April 2023 a jury convicted Sisk of multiple counts of capital murder and he was sentenced in the September of that year to life in prison without the possibility of parole. He escaped the death penalty because he was a minor at the time of the horrific crimes.
Circuit Judge Chadwick Wise called Sisk’s crimes, “ghastly, disturbing, and draped in unmitigated evil”. He said he deserved the harshest punishment allowed by law.
After the sentencing, during which Sisk reportedly had no reaction, Limestone County District Attorney Brian C.T. Jones gave a written statement to reporters. It read: “I’ve prosecuted a lot of people in my career, and I can tell you that out of all of those people, only four out of five people scare the hell out of me and he’s at the top of my list. Mason Sisk is clearly one of the most dangerous people who will ever be sentenced in Limestone County.”