Kyron Horman's Dad Bluntly Tells Court He Suspects Step-Mom in Boy's Disappearance

PORTLAND, Ore. July 8, 2010 — -- The father of Kyron Horman stated in a court document that he believes his wife, who is Kyron's step-mother, was involved in the disappearance of the 7-year-old boy who vanished more than a month ago, and that police have given him information to bolster that suspicion.

Kaine Horman and his ex-wife Desiree Young have pleaded with Terri Horman to cooperate with the investigation into what happened to their son, suggesting they suspect the step-mother was involved in his disappearance.

But the husband bluntly states in a request for a restraining order that he blames his current wife for whatever happened to Kyron.

"I believe respondent is involved in the disappearance of my son Kyron who has been missing since June 4, 2010," Kaine Horman wrote in his application to the court.

He adds, "I also recently learned that respondent attempted to hire someone to murder me. The police have provided me with probable cause to believe the above two statements are true."

The restraining order was unsealed by the circuit court in Multnomah County, Ore., today after the county's Major Crimes Team told the court they no longer believed that releasing the information "would undermine their investigation into the disappearance of Kyron Horman."

The release of the restraining order came as it was revealed that a potential opportunity to arrest Terri Horman was thwarted by an ill-executed sting operation at the family's home last month.

ABC's Portland affiliate KATU is reporting that the landscaper police say Terri Horman allegedly contacted to kill Kaine Horman was in on the sting, but then raised the woman's suspicions enough that she called 911.

The landscaper showed up at Horman's door June 26 wearing a hidden microphone to demand hush money. Undercover agents were nearby. But the plan backfired when Horman called police to report an emergency, according to KATU, telling the dispatcher a man at her door wanted $10,000.

KATU cited sources as saying that was the second call of the day. The first came minutes earlier to report that someone in a truck was threatening her.

Responding officers found themselves face to face with the undercover agents and Horman was not taken into custody.