A group called Justice Coalition has put up a $30,000 reward for information leading to the arrest and conviction of Somer's killer. Some of that reward money came from Crimestoppers, which urged anyone with information to call 866-845-TIPS. Callers can remain anonymous.
Clay County police asked tipsters to call 877-227-6911.
Somer vanished on her mile-long walk home from school Monday in Orange Park, near Jacksonville. The 4 feet 5 inch child had her hair in a ponytail and was wearing a purple Hannah Montana backpack and carrying a lunch box at the time.
She had been walking with her two siblings, including a twin brother, and a friend when she got into an argument with another child. Somer walked ahead of the group and was never seen again.
The girl's distraught mother had held out hope earlier in the day that her cheerful, outgoing daughter would come home and pleaded with potential kidnappers.
"They should know that she's one of the most loving little girls in the whole wide world," Thompson said through her tears. "She doesn't know a stranger."