Terri Horman on disappearance of stepson Kyron Horman: 'I did not kill him'

Kyron Horman mysteriously vanished from his Oregon elementary school six years ago after his school science fair. There have been hundreds of searches, but there has been no trace of the now 13-year-old. His parents, Kaine and Deisree, claim that Kyron's stepmother, Terri, reportedly the last person to see the boy alive, knows what happened to him – but Terri is adamant that she had nothing to do with his disappearance and insists she loved the boy like her own child.

See photos of Kyron before his disappearance and the ongoing investigation:

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Kyron Horman boy who vanished in 2010
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Kyron Horman boy who vanished in 2010

Kyron Horman prior to his disappearance on June 4th, 2010.

(Image Courtesy of the Horman family/Bring Kyron Home)

Kyron Horman prior to his disappearance on June 4th, 2010.

(Image Courtesy of the Horman family/Bring Kyron Home)

Kyron Horman prior to his disappearance on June 4th, 2010.

(Image Courtesy of the Horman family/Bring Kyron Home)

Kyron Horman prior to his disappearance on June 4th, 2010.

(Image Courtesy of the Horman family/Bring Kyron Home)

Kyron Horman prior to his disappearance on June 4th, 2010.

(Image Courtesy of the Horman family/Bring Kyron Home)

Kyron Horman prior to his disappearance on June 4th, 2010.

(Image Courtesy of the Horman family/Bring Kyron Home)

Kyron Horman prior to his disappearance on June 4th, 2010.

(Image Courtesy of the Horman family/Bring Kyron Home)

Kyron Horman prior to his disappearance on June 4th, 2010.

(Image Courtesy of the Horman family/Bring Kyron Home)

Kyron Horman prior to his disappearance on June 4th, 2010.

(Image Courtesy of the Horman family/Bring Kyron Home)

Kyron Horman prior to his disappearance on June 4th, 2010.

(Image Courtesy of the Horman family/Bring Kyron Home)

ABC NEWS - The former stepmother of Kyron Horman is sharing her story for the first time since the boy disappeared in Portland, OR, more than 5 years ago. Juju Chang talks with Terri Horman for a PEOPLE/ABC News exclusive interview which will air on JAN. 22 on GOOD MORNING AMERICA (7-9am, ET) and JAN. 23 on NIGHTLINE (12:35am, ET) as well as all ABC News platforms. (Photo by Heidi Gutman/ABC via Getty Images) JUJU CHANG, TERRI HORMAN
ABC NEWS - The former stepmother of Kyron Horman is sharing her story for the first time since the boy disappeared in Portland, OR, more than 5 years ago. Juju Chang talks with Terri Horman for a PEOPLE/ABC News exclusive interview which will air on JAN. 22 on GOOD MORNING AMERICA (7-9am, ET) and JAN. 23 on NIGHTLINE (12:35am, ET) as well as all ABC News platforms. (Photo by Heidi Gutman/ABC via Getty Images) TERRI HORMAN, JUJU CHANG
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"I need people to know I did not harm my son," says Terri. "I'm being unfairly portrayed in the media. I'm not this monster that people are suggesting that I am."

WATCH: Terri Horman Describes The Last Time She Saw Stepson Kyron Horman Before He Disappeared

Terri, who was never named by law enforcement as a suspect but has remained under a dark cloud of public suspicion, says she wants to set the record straight and clear her name.

"I'm not guilty. I'm not a person of interest, I'm not a suspect, and there's a good reason for it: the fact is I don't know where he is. I don't know who has him," Terri says. "I love Kyron. I miss him very much ... I'm suffering, too, every day without him. People need to know that I have nothing to hide. I did not kill him, I did not kidnap him, and I just want him found. I'm an innocent person."

WATCH: Was Stepmom of Missing Kyron Horman Involved In Murder-For-Hire Plot?

Why did it take Terri so long to speak out? Watch more from Wednesday's episode here. And on Thursday, Terri, who failed two polygraphs, answers questions about what some have alleged was suspicious behavior in the days and weeks following Kyron's disappearance.

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