Danielle Locklear, 15, has not been seen in more than a week.
Now, the FBI has even released a poster looking for information about Locklear's disappearance.
"As information comes in and leads come in, we are beating the bushes on them," said Hope Mills Police Capt. David Servie.
Dozens of searchers did search a lot Wednesday, but they still don't know where Locklear is or if she is alive. Despite coming up empty handed so far, police reaffirmed their resolve to find her.
"All possible explanations for her disappearance are still being investigated," said Servie. "We are going to keep working and keep going."
Locklear disappeared March 11 and has not been seen or heard from since.
For the second day, officers went door-to-door in several neighborhoods asking residents if they had seen or heard anything.
ABC11 has learned that police have subpoenaed the cell phones from Locklear's former boyfriend and several classmates and friends. Officers also concentrated a search in an area around an RV campground near Interstate 95.
At a briefing Wednesday evening, police said right now they only know that Locklear is missing.
"All possible explanations for her disappearance are still being investigated," said Servie. "We do not know where she is or what happened to her. That's why the public's help is very important in this."
If you have any information concerning Locklear's whereabouts, please contact the Hope Mills Police Department at (910) 425-4103, or the FBI in Charlotte at (704) 672-6100.