ORANGE PARK, Fla. -- Two weeks after 7-year-old Somer Thompson disappeared while walking home from school, an anonymous donor added $10,000 to the reward for catching her killer.

This brings the total Crime Stoppers reward for an arrest in the case to $15,000. Just over an additional $30,000 is available through the Justice Coalition for the arrest and conviction of whoever killed Somer.

"To be eligible for the Crimestoppers reward, you do have to call the Crime Stoppers number," said Wyllie Hodges, executive director.

In addition to calling 866-845-TIPS, tips can be e-mailed to rewards@fccrimestoppers.com, left on the Web site, or by text message by sending "TIP326" plus message to "CRIMES."

All calls, e-mails and texts to Crime Stoppers remain anonymous.

America's Most Wanted will air a presentation nationally on Saturday night regarding the search for Somer's killer.

Somer's body was found two days after she disappeared in the landfill in Charlton County, Ga., where Orange Park's garbage is dumped.

Detectives with the Clay County Sheriff's Office, the Florida Department of Law Enforcement and the FBI continue to investigate Somer's disappearance and slaying.

Despite 2,600 tips received, no one has come forward to say they saw the girl abducted or attacked.

Investigators have talked to all 161 registered sex offenders who lived within a 5-mile radius of Somer's home, but that doesn't mean they've been cleared.

"There's someone out there who's killed a child, and he's still out there in our community," Clay County Sheriff Rick Beseler said last week. "He may not be right here in Orange Park, but they're still out in society. And I want that person off the street."