With the search now on the 11th day, investigators are exhausting all leads.
On the Texas Department of Public Safety's website, there is a link to the state's sex offender registry.
According to the site, there are over 20 sex offenders listed with Colorado City addresses, 16 live within two miles from Hailey Dunn's house.
We are not saying these offenders were involved, this is merely a break down of what investigators are looking into.
KRBC crews in Colorado City caught up with one of the men on the registry, and he says he got a visit from law enforcement early on in the search.
"They came and knocked on our door, I answered and they told me, 'Stay out here,' and they went in and talked to my wife. They searched my house and everything else but they didn't find [anything]," said Michael Lindsey.
Lindsey said he knows Dunn's father, and wants to see a safe and quick resolution. He even said he's joining in on the search, himself.
While the offenders are being tracked, they weren't the only ones opening their doors to law enforcement. Investigators went door-to-door asking and probing more in depth as they search for clues.