Trigger Warning: Child Death, Violence

In Alabama, a 14-year-old boy in Alabama fatally shot five members of his family, including a six-month-old baby, after discovering his stepmom was not his biological mother, a family member told local media. It was also shared that the boy had recently discovered that his biological mother had abandoned him when he was just 3-year-old, and had passed away in 2011.

Daisy McCarty, the teen's cousin, said the boy found out about his stepmother last week, which she believes "triggered" him, WAFF-TV in Huntsville, Alabama, reported. The boy confessed killing his father, 38-year-old John Sisk; his stepmother, Mary Sisk, 35; his 6-year-old half-brother; his 5-year-old half-sister; and his 6-month-old half-brother in their home in Elkmont, Alabama, Limestone County Sheriff's Office spokesman Stephen Young told reporters Tuesday.

McCarty told WAFF-TV that her cousin had started acting out a year ago, burning animals alive and vandalizing school property. “I think he’s been having problems. And everybody, I don’t know why everybody didn’t just see it," she said. "That’s what bothers me because they’d seen it, but they didn’t do anything about it really.”

Young said that the boy will face five counts of juvenile murder, but "pending adjudication could face adult charges of multiple counts of murder and/or capital murder." Elkmont, the town where the murders took place is a quite area, northwest of Huntsville near the Alabama-Tennessee border.

"There are not enough words to convey the sense of loss this family is feeling at this time and there is little the rest of us can do to bring them comfort," Elkton Mayor Tracy Compton said in a statement. "We pray as a community for healing in this unprecedented situation and know that together we will persevere and eventually overcome."

The 14-year-old called 911 himself on Monday evening, according to Young, and told deputies that he'd heard gunshots upstairs while in the basement. He said he managed to escape out the front door. The investigation revealed discrepancies in the boy's story and police confronted him about the contradictions. He then confessed to shooting all five members of his family.

Three of the victims were confirmed dead at the home, and two others were airlifted in critical condition and later died, the Limestone County Sheriff's office said in a tweet. The suspect assisted police in recovering the 9mm handgun, which was found on Tuesday morning on the side of the road.

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Young said the gun was in the home "illegally." The boy is currently being held at a juvenile detention facility. Karen Tucker, a spokeswoman for the Limestone County School District, told reporters that counselors and mental health professionals will be on site for "as long as there is a need."

The district is "deeply saddened" by the tragedy, Tucker said. "We're concentrating our efforts in assisting the students and the faculties as well as community in dealing with this tragedy."