Kyron Horman's Mother Speaks Out on Stepmother

Feb. 20, 2011— -- Kyron Horman's mother said today she has begun to put new pressure on the missing Oregon boy's stepmother with a clear message: She will not stop until Terri Horman is "brought to justice."

Desiree Young spoke with "Good Morning America" today from Roseburg, Ore., the town 200 miles from where Kyron was last seen and the new home of Kyron's stepmother, Terri Horman.

Kyron Horman disappeared the morning of June 4, after participating in an early morning science fair at his suburban Portland elementary school. Police said he was last seen walking down a hall at the school with his stepmother.

"Kyron's story is not one of a child that wandered away from his school or was abducted by a stranger," Young said Saturday at a news conference in Roseburg. "It was somebody who was brought into our family. ... There is one person that knows where he is: Terri Horman, where is Kyron?"

On "Good Morning America" today, Young said she has gone to Roseburg to distribute flyers urging people in the small town to keep asking that question of Terri Horman, the last person known to see Kyron.

"I believe that it was important to raise awareness in Roseburg, [where] people are not aware of who I am, who Kyron is, let alone Terri, who lives here," Young said.

"It was concerning, because we have knowledge that she's handing out Halloween candy to children, she's going into bars, and enjoying the holidays with her family -- all while Kyron is not here. We thought it was time to step it up a notch," she said.

Young also said investigators presented her with new evidence that she said raises questions about Terri Horman's character.

"[The evidence] indicated that not only could Terri be capable of this, but it was clear that she hated Kyron, and blamed everything on Kyron -- and had expressed that on various occasions to friends and people that she knew," she said this morning.

Phone calls to Terri Horman and her attorney from ABC affiliate KATU-TV in Portland about Young's efforts and her new claims were not returned Saturday.