The family of Orlando Harris, the gunman who killed two and injured seven more at the St Louis high school shooting on Monday, October 24, tried treating him with therapy and medication.

Harris was a former student of the Central Visual and Performing Arts High School, where he took the lives of a teacher, Jean Kuczka, and 15-year-old student Alexandria Bell, before being shot dead by the police.

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However, new information about the shooting suggests that his family tried to treat him using therapy and medication, as well as removed the gun which was used by Harris in the shooting from their home.

Local authorities received reports of a domestic disturbance at Harris’ home on October 15. The reason behind the report was Harris’ mother came across the firearm at her home and wanted the police to remove it, CNN reported.

“Officers responded and determined at that time the suspect was lawfully permitted to possess the firearm,” a statement issued by the St Louis Police Department read.

“A third party known to the family was contacted and took possession of the firearm so that it would no longer be stored in the home,” it continued.

Authorities have since confirmed that the firearm that was removed from Orlando Harris’ home was the same weapon that was used by the gunman in the high school shooting on October 24. While it was taken away by a ‘third party’, it is still unclear how the 19-year-old gunman repossessed the gun.

As per Michael Sack, the interim Commissioner of St Louis Police, Harris’ family has been cooperating with the police. He also revealed that they had “done everything they could have possibly done.” This includes medication and therapy, reports have suggested. It has also been reported that Orlando Harris was committed to a mental health facility several times.

“The mother, the adult daughter, they worked with him. They kind of had a system where they would track what might come in the mail, his interaction with others, and try to make sure that he’s engaging people, that he feels loved,” the interim Commissioner revealed.

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He also stated that the family would search Harris’ room sometimes because of concerns and kept contact with medical professionals who took care of Harris. “Sometimes that’s not enough,” Sack continued.

Police discovered a notebook and a handwritten note in Harris’ vehicle following the shooting. “I don’t have any friends. I don’t have any family. I’ve never had a girlfriend. I’ve never had a social life. I’ve been an isolated loner my entire life,” the note read.