Jan. 13, 2011 -- Hailey Dunn, the Texas girl missing for nearly three weeks, was scared of her mother's boyfriend Shawn Adkins, and said he would stand in the doorway of her bedroom at night watching her.
"Hailey did not like him. She was afraid of him and she didn't want him there," Hailey's paternal grandmother, Connie Jones, told ABCNews.com today.
Adkins, 25, was called one of several persons of interest on Wednesday by investigators in Colorado City, Texas. He was the live-in boyfriend of her mother, Billie Dunn. The couple is reportedly no longer together in the aftermath of Hailey's disappearance.
Adkins was the last person to see the 13-year-old cheerleader on Dec. 27, 2010. Dunn, 33, reported her daughter's disappearance the next day.
"She's very beautiful and outgoing," Jones said. "She plays softball and basketball. She's into all kinds of activities."
Hailey told her grandmother that Adkins would pace around the house at night, talking on his cell phone in the bathroom and peering into her bedroom.
"She had told me on a couple of occasions that...he walked around at night and she said that she could see his shadow standing at her door. She said, 'Nana, he scared me. I'm afraid he's going to come in there,'" Jones said.
Hailey's grandmother said she prays that Dunn was not involved in Hailey's disappearance.
"I don't want her to be involved because she's the mother of my grandkids and they love her," Jones said.
Jones last saw the middle schooler on Christmas Day when Hailey tried to take a picture of her grandmother with her brand new ipod.
"It was a good day," Jones said. "She ate two pieces of chocolate pie and we sat and talked. She told me everything that she had gotten for Christmas."
Jones saw Adkins that day too. She said he was quiet and said nothing to her.
"Ever since this has happened, he's been my top priority as a suspect. I've just always had an eerie feeling about him...just a gut feeling that he's not a trustworthy person," Jones said.
City Manager Peter Kampfer said that investigators have received over 250 leads.
"The law enforcement task group is pursuing all leads. They are aggressively focusing on the criminal aspect of this investigation at this time," Kampfer said.
Kampfer would not comment on whether Hailey's mother is a person of interest or still under investigation.
"As an ongoing part of investigation, I cannot answer that," Kampfer said.
Adkins' car, a white Chevrolet Lumina, and cell phone have been seized. The mother's cell phone has also been seized and her home has been searched.
Records show that police were called to Dunn's home in February of last year after Adkins threatened to hurt Billie and Hailey Dunn.
Dunn and Adkins' 'Hobby' Included Studying Mass Murder
Police affidavits reveal disturbing behavior from the one-time couple.
In their bedroom were hundreds of pages printed from news web sites including ABC News about "mass murderers, serial killers, sexual sadist, murders of family members," according to the affidavit.
Dunn described the documents as "a hobby," according to the affidavit.
Both Dunn and Adkins failed polygraph exams. Dunn took a lie detector test twice. The first test ended prematurely when investigators discovered Dunn was under the influence of narcotics. The second exam indicated that she had been deceptive, according to the affidavit.
Adkins took three polygraph exams. The first two times, he walked out of the room before the test was completed. The third time, he was found to be deceptive during the first part of the exam. During the second stage of the exam, Adkins revealed that Hailey might be in Scurry County, Texas. Investigators deemed him to be telling the truth. When pressed about a more precise location for the girl, Adkins refused to complete the test, according to the affidavit.
Kampfer said that investigators have searched Scurry County.
Investigators said that Adkins has given contradictory statements about the day Hailey disappeared.
Adkins also told investigators that he was fired from his job the day Hailey disappeared. Adkins worked for a company that does oil well casing and logging. His boss, however, told investigators that he wasn't fired, but abruptly left work minutes after showing up, according to the affidavit.
Adkins told investigators that he drove straight to his mother's home in Big Spring, Texas. Cell phone records show Adkins making calls from Dunn's home between 6:35 a.m. until 6:56 a.m., the court papers state.
Dunn left for work as a receptionist at a hospital at 6:20 a.m.
"According to all reports, Hailey Dunn would have been alone in the residence during this time period," the affidavit said.
Adkins eventually went to the home of his mother and used her computer. That computer has been taken as evidence, the affidavit said.
Hailey Dunn Missing Nearly Three Weeks
On the evening of Hailey's disappearance, Dunn and Adkins reportedly withdrew money from two banks to buy drugs, according to the affidavit.
There are also claims that the couple had a New Year's party, just days after the 13-year-old girl disappeared, according to the affidavit.
Dunn denied that, telling the Associated Press that just a few friends came over for drinks.
Dunn told the Associated Press that she had nothing to do with her daughter's disappearance. She said that she asked Adkins to move out Jan. 5.
"If investigators can't rule him out, I can't either," Dunn told the AP. "I'm unsure at this point."
ABC Affiliate KTXS and the Associated Press contributed to this report.