PORTLAND -- The step-mother of missing seven-year-old Kyron Horman has hired one of Oregon's most well-known criminal defense attorneys, legal sources told KGW.

While police have not officially called Terri Moulton-Horman a suspect, shehas hired attorney Stephen Houze, according to those sources.

Houze, often referred to as the top criminal defense attorney in the state, has also taken on many high-profile cases including former Trail Blazer Damon Stoudamire and Dr. Jayant Patel, dubbed Dr. Death by Austrailian media.

Kyron Horman's family, minus Terri Horman, gave a brief statement on Thursday. Kyron Horman's mother, Desiree Young, urged the public to keep looking for Kyron. Appearing with Kyron's father and stepfather, she also urged his Kyron's stepmother to work with investigators.

We implore Terri Horman to fully cooperate witn investigators to bring Kyron home, said a tearful Young.

Meanwhile, KGW has learned that a threat related 9-1-1 call was made from the home of missing Portland boy Kyron Horman Saturday night, two days before the father filed for divorce and obtained a restraining order against his wife.

Kaine Horman recently moved out of the family home with the young daughter he shared with TerriMoulton-Horman.

The restraining order was sealed by Multnomah County Circuit Judge Keith Meisenheimer, who handles family law. However, the abuse prevent petition showed that Terri Moulton-Horman was granted no parenting time and restricted from accessing firearms. The no firearms clause was routine in such cases, a court clerk said. Kaine Horman was granted sole child custody, although no children were specifically named in the documents.

Kaine had moved out of the home with their 18-month-old daughter, Kiara last Saturday. Then, on Monday, he filed divorce papers and a restraining order in Multnomah County Circuit Court. The divorce papers list irreconcilable differences and a breakdown of marriage as the reason he left her.

Early Monday, Terri Horman denied to KGW that Kaine had moved out of the home they shared in Northwest Portland. She also said she knew nothing of a statement getting released by Kaine, along with his ex-wife Desiree Young and her husband, Tony Young.

The statement, released late Monday, read in part: Any actions taken by the investigation, or by us, are based on the best interests of Kyron and Kiara and comply with the law. Beyond this, we have no comment on the matter. It was signed by Kyron's father, step-father and mother, but not Terri, Kyron's step-mother.

The statement also said that the trio was in support of the investigation. So far, the investigation included several searches of the Horman home, at least two polygraph tests for Terri and many hours of police questioning, among other things.

Step-mom a focus of investigation

In addition to this update in the case, Kyron's photo was on the cover of 'People' for the second week in a row and the story that went with it focused on the attention that has been placed on Terri.

Terri's father, Larry Moulton, 72, told 'People' matter-of-factly that the finger points at step-mom, she's trying to be cooperative.

He, too said she has had two polygraphs, that police have taken her truck twice and questioned her several times, for up to six hours. He also described his daughter as really good with kids and pointed to a Halloween outing to pumpkin patches with the family in costume.

Since Kyron vanished three weeks ago, police singled her out in a questionnaire sent to parents and staff of Skyline school. A lifelong friend described Terri's unhappiness with the second polygraph test.

Parents grant TVinterview

The People magazine cover story comes right after Kyron's mother and father sat down with KGW and answered some of the most commonly-asked questions, including why investigators had focused on Sauvie Island. However, Kyron's parents would not answer questions about Terri Moulton being given lie detector tests, and they said she would not be speaking to the media.

Questionnaire singled out Terri Moulton

Police scoured scores of questionnaires turned in by parents of Skyline Elementary School children, staff members and even delivery drivers for new clues last week as they tried to untangle the mystery of Kyron's disappearance.

The questionnairescontained several questions that were intended to help trigger people's memories about the day that the seven-year-old disappeared.

Among the questions were: Did your child see Kyron's step-mom, Terri on 6/4/10, at or near the school? and Did your child see a white Ford F250 pickup truck on 6/4/10 at or near the school? Terri Horman, Kyron's step-mother, was driving the white truck on the day he disappeared. The questionnaire also showed photos of Terri and the truck.

Capt. Jason Gates said during a press conference that the photos and questions were an effort to jog people's memory in the case, since Terri was the last person who spent time with Kyron.

Gates added that the family was in full support of the decision to circulate the new questionnaire Friday. He read a family statement that said, Any parent would understand the grief that this causes our family... please know that we fully support the release of this flier and we want Kyron home and we hope that this will do that.

KGW has learned that police over the weekend also asked Terri to take a second lie detector tests as part of the investigation.

A close friend of Terri's told KGW she is a wonderful mother who's known Kyron since he was three days old. She said the extra scrutiny has taken an emotional toll on her.

Gates refused to comment about any possible suspects or persons of interest in the case.

The other questions on the form were more generic in nature, including Did your child see Kyron on 6/4/10? and Where did your child see Kyron?

Case gets national attention

The biological mother of missing seven-year-old Kyron Horman reached out with an emotional letter to her son, hoping and praying that he would return home and read it soon.Desiree Young shared the letter with NBC's 'Today Show' as part of their ongoing coverage of the missing boy case.

Last week's issue of 'People' shows a photo of Kyron on the cover and features an article about his case. In addition, 30 billboards were going up across Oregon with Kyron's photo and tipline. Police were hoping the extra attention will bring even more tips and clues for them to follow up on.

Anyone who has seen Kyron Horman or knows of his whereabouts is asked to call police at(503) 261-2847.

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