s stepmother -- who became the most prominent figure in the investigation into the boy's disappearance Friday -- is scheduled to take a second polygraph test Saturday, according to a friend.

Investigators put photos of

, 40, and the type of pickup she was driving the day Kyron vanished, on

Jaymie Finster, a longtime friend, said Horman is "tired and frustrated with the intensity of the questioning she's been getting."

After taking one polygraph test, Finster said, Horman is taking another one Saturday and "she's not very happy about it." Finster has known Horman since they went to junior high in Roseburg and worked together in the Hillsboro School District, where Finster is a special ed teacher. She said Horman and her husband, Kaine, are exhausted as the investigation drags on.

Friday, the Multnomah County Sheriff's Office held a press conference to release the flier with Horman's face on it and to dispel online rumors that the second-grader had been found.

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Capt. Jason Gates would not say whether Terri Moulton Horman is a suspect in the second-grader's June 4 disappearance from Skyline School.

"Terri is the last known person to have seen Kyron before he disappeared," Gates said. "We are releasing this information at this time in hope that it helps jog people's memory of that day."

Horman told Finster, "I just don't know what's going on. This is what I did that day."

Finster said Horman had told Kyron's teacher the day before that she was taking the boy to the doctor on Friday, June 11, and gave the teacher paperwork to fill out related to the appointment.

Finster said that when Kyron didn't show up at the bus the afternoon of June 4, Horman talked to the teacher who said she thought that Horman had taken Kyron to the doctor that day. Horman told Finster that the child's teacher was new, in her first year of teaching, and was hard of hearing in one ear. "She doesn't know if she understood her," Finster said.

Investigators say Horman told them she last saw Kyron at 8:45 a.m. June 4 as he walked to his classroom after the two had toured the school's science fair. Previously, officials had said that Kyron had been seen around 9 a.m. by an unnamed witness, but Gates declined to clarify the discrepancy Friday.

Gates said Terri Horman and the rest of Kyron's family have cooperated with the investigation. In a statement he read at the press conference, Kyron's family expressed its support for the release of the flier.

"We want Kyron home, and we hope this will help do that," the family said.

Gates repeatedly said he could not comment on suspects or persons of interest in the case. In response to a question about the possible danger to the community, he said: "I can't say for certainty that it wasn't stranger-to-stranger, I can't. But I also can tell you that the need for the public to be alarmed is very low."

Finster said Horman was very down. "She's exhausted. She said I don't understand why they keep asking me stuff. They want me to take the polygraph again. It doesn't make sense because I didn't do anything."

Authorities are also asking anyone who was at Skyline School between 8 a.m. and 4 p.m. June 4 to answer questions regarding Kyron's disappearance, even if they have already been interviewed by investigators.

The form asks whether Horman or the family's white Ford F250 pickup were seen at the school and when. There are also questions about Kyron: If he was seen at Skyline, when and if he was with anyone else.

Although investigators have already interviewed teachers, staff, students and parents -- in some cases, two or three times -- Gates said they want to be thorough.

"We can assure you that our primary goal is not to make any mistakes in this case -- to be as perfect as we can in investigating this case."

Gates said the questionnaires would enable investigators to check and double-check leads. They also want to make sure they have contacted everyone who was at Skyline that day, including people who might not normally be at the school.

"It's very important that we reach everyone who was here," Gates said.

Gates said the information gathered from the questionnaire would help advance the case.

"A huge part of this investigation right now is we're eliminating a lot of leads and clearing a lot of leads," Gates said. "That's important so we can get focused in."

The pickup in question has since been towed from the Horman home. Gates said that the family requested it be towed because of a mechanical problem and that the towing was not related to the investigation.

Gates said officials continued to make progress. Minutes after the press conference ended, a dive team was seen searching a pond just down the street from the school.

Gates continued to ask for the public's help in finding Kyron, and he said the many rumors that have appeared online about the case -- including reports Thursday on Facebook and Twitter that Kyron had been found and an arrest had been made -- were hurting the investigation.

"Those are not true," Gates said. "He has not been found yet, and the community needs to keep looking for him."

Gates also addressed the missing boy directly.

"Kyron, we are still looking for you," he said.

Kyron's family thanked the Multnomah County Sheriff's Office, searchers, the media and the community as a whole for their support since Kyron's disappearance.

"Father's Day is Sunday. For the first time in seven years, we will not have Kyron around to hug and talk to," the family said. "It hurts us deeply and our heart is broken.

"Please help bring Kyron home."

The fliers and questionnaire are available online and a link is on

. Gates said the questionnaires can be returned to

where a deputy will be available to collect them between 9 a.m. and 7 p.m. Sunday.

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