June 30, 2010 — -- A call to 911 from the home of Kyron Horman's father and stepmother has been added to the police investigation of the 7-year-old boy's disappearance.
Sheriff's officials would confirm only that someone had called 911 from Kaine and Terri Horman's home late Saturday, the same day that Kaine Horman reportedly moved out, taking the couple's young daughter with him.
The reason for the call has not been released, and police said the call is now part of their case into Kyron's disappearance. Two days later, Kaine Horman filed for divorce and a restraining order against Terri Horman, the last person known to have seen Kyron alive nearly a month ago.
A records search of Terri Horman under her current, maiden and previous married names turned up a DUI conviction in 2005 in which she pleaded guilty not only to driving under the influence, but also to "reckless endangerment of another."
Oregon State Police Lt. Gregg Hastings told ABCNews.com that the endangerment charge stemmed from the fact that her son, who was 11 at the time, was in the vehicle when she was stopped.
A spokeswoman for the court in Marion County, Ore., said Horman was sentenced to 12 months probation, a 90-day suspension of her driver's license and she had to attend alcohol counseling programs and attend a victim impact statement.
In addition, she wracked up nine traffic infractions, including several for speeding and one for driving with an expired license, between 1988 and 2004.
In the weeks that Kyron has been missing, his family seems to have crumbled, and experts said his parents' actions speak volumes, even as the two remain silent.
The divorce papers cite "irreconcilable differences."
But to file the type of emergency restraining order that he did, Kaine Horman would have had to made the case that his wife posed an immediate threat to him or their 18-month old daughter, according to former FBI special agent Brad Garrett.
The restraining order prohibits Terri Horman from having contact with her other children, an older son and the toddler daughter. Kaine Horman is asking Oregon courts for sole custody of the little girl.
The order also prohibits Terri Horman from possessing any guns, according to The Associated Press.
The restraining order has been sealed by a judge who said he was concerned that releasing the entire document could jeopardize the investigation into the disappearance of Kyron.
Under Oregon law, the type of emergency restraining order granted to Kaine Horman would require some specific example of why there was an immediate threat of danger, Garrett said. So far, there's no word on what Kaine Horman could have told the judge.
"There's something under the surface here that we don't know about," Garrett told "Good Morning America" today. "There's got to be some pattern of abuse here. It's not something that all of a sudden happened and he decided to go to court."
Terri Horman, who has raised Kyron since infancy, has said virtually nothing in public about the June 4 disapperance of the little boy, appearing twice in solidarity with her husband and Kyron's mother and stepfather.
Terri Horman's name, however, was not on in a statement issued Monday night by Kyron's mother, father and stepfather.
"We have been fully briefed by law enforcement on the ongoing criminal investigation," the statement read, adding that the family was "in complete support of that investigation."
Mounting Suspicion, Few Answers in Kryon's Disappearance
Police have not named her or anyone else as a suspect or person of interest. Kyron disappeared from his elementary school after an early-morning science fair, where he was photographed smiling near his presentation on frogs.
Terri Horman told police that after touring the fair with Kyron, she last saw him walking down the hallway to his classroom. He never made it. Garrett noted that whoever took Horman likely planned the abduction as such decisions are rarely made spur of the moment.
Garrett questions whether police actions, including a reported six-hour interview with Terri Horman and the search of her home and car, and those of her husband could be part of a larger plan to get her to open up about the day Kyron vanished.
"It's almost like a psychological noose that they're pulling around," he said. "If we push her a little bit further, maybe she'll tell the truth."
A website devoted to the search for Kyron posted a message today that the site would be taken down at the end of the week, and that no more bracelets or buttons would be distributed unless through Kaine Horman.
The whole chain of explosive events, Garrett said, is unusual when there was no previous indication, at least publicly, that anything was amiss in the Horman family.
"It's very hard because with no history of any issues in this family and then Kyron disappears," he said.
Kaine and Terri Horman married in 2007. Their blended family included Kyron and Terri's older son and the couple's daughter.
Though police have told the public that Kyron's disappearance is an isolated incident, parents remain very on edge.
"For me it is still a daily worry," parent Coert Vonk said. "He's still in our thoughts and we all hope that he comes back really soon because everybodys scared."
Speculation has mounted in recent weeks that Kyron's stepmother might know more about the second-grader's disappearance than she had initially let on.
Her husband's decision to file for divorce Monday comes on the heels of an interview Terri Horman's father gave to People magazine, in which he was quoted saying there's a "50-50" chance his daughter would be arrested.
He now says his statements were twisted around and is staying with his daughter to support her.
Terri Horman Has Taken Lie Detector Test
One of Terri Horman's friends told ABC News earlier this month that she was given a polygraph test.
And police collected a questionnaire they sent out to the community in which they asked if anyone saw Terri Horman or the white truck she was driving on the day Kyron disappeared.
"Clearly, they need more information about what she did that day, where she was that day, and that's why they put this out," Jensen said.
Last week, Kaine Horman told "Good Morning America" that Terri Horman's actions that morning were part of the investigation.
"Those are things that she's been working with law enforcement," he said. "So I'm, unfortunately, not able to comment on that at this time."
Kaine Horman and Kryon's mother, Desiree Young, pleaded in the same interview for their son to "come home."
"Honestly it's a parent's worst nightmare," Young told "Good Morning America" last week. "We've racked our brains trying to think of reasons why. We cannot come up with anything... It's like a portal opened up in the school and Kyron just vanished into it. It's a mystery."