The FBI has announced a new $25,000 reward for information regarding the disappearance of Brittanee Drexel.

At a press conference on Wednesday, authorities stated for the first time that they believe Drexel was killed. Drexel was last seen leaving the Blue Water Resort in Myrtle Beach on April 25, 2009. She was 17 at the time, and had traveled to Myrtle Beach on spring break with friends.

The FBI said they believe Drexel was taken to McClellanville, South Carolina, where she was held against her will for several days and ultimately killed.

No specifics were mentioned, but authorities said they have pursued leads across the country, and they know someone is out there with the information they need. They urged people to come forward with even the smallest tip.

The FBI also said they would not hesitate to use U.S. attorneys to charge people if they suspect they are withholding information.

Drexel’s parents, Dawn and Chad Drexel, also gave an emotional plea for help finding their daughter’s remains and bringing her killers to justice.

Law enforcement will be canvassing the area handing out flyers and looking for leads, and 23 new billboards will be going up in the area to advertise the reward.