It turns out, those suspicions are backed up by statistics.
Earlier this week, Shawn Adkins appeared on KTAB News saying what he was expected to day about his girlfriend's missing 13-year-old daughter.
"I just want her to come home safe," Adkins told KTAB's Priscilla Luong.
In some people's minds, the statements did nothing to take the suspicion off his back.
Though the suspicion is nothing more than just that -- suspicion -- Abilene Police Department Detective Erin Bennett, who has been investigating crimes against children for three years, says the feeling isn't necessarily unfounded. Though Bennett can't speak directly to the Dunn case, she can speak in general terms.
"When those elements are there, in your experience, what have you found? There's daughter, mom, and live-in boyfriend," asked Sotelo.
"In similar cases I've investigated, unfortunately, in the majority of those cases, mom's significant other ends up being our suspect," said Bennett.
When asked if she could put a percentage on the number of cases when the mom's significant other is to blame for the crime, Bennett said she couldn't come up with a number. However, she could say it was a majority.
APD Detective Lee Reed is considered one of the most respected area experts in child abduction cases.
"Statistically speaking, family friends and parents kill their children more often than strangers."
Those are statistics everyone is hoping don't prove to be reality in Hailey Dunn's case.
It's important to note law enforcement has not named any suspects in Hailey's disappearance.