Sheriff: Help Me Catch Somer Thompson's Killer

Photo: Somer Thompson.

ORANGE PARK, Fla. (CBS/AP) Somer Thompson's killer is still out there and the sheriff charged with finding the person who dumped the the little girl's body in a Georgia landfill is asking the public for help.

PICTURES: Somer Thompson

Clay County Sheriff Rick Beseler on Wednesday asked the public's assistance in identifying people who may have exhibited certain changes or unexplained behaviors.

He listed some of the behaviors as: Leaving the area unexpectedly, missing work or routine engagements, having unexplained injuries and having an unnatural interest in the status of the investigation.

Thompson, 7, first went missing Oct. 19 from Orange Park, Fla., a Jacksonville surburb. Her body was found two days later in a Georgia landfill. The police strategy of tracking the routes of local garbage trucks paid off early in the investigation and helped to find Thompson's body shortly after her kidnapping. But so far using that strategy in reverse has not led to her killer.

Somer Thompson was buried Tuesday as funeral organizers filled the sky with purple balloons, Thompson's favorite color.

Authorities investigated about 1,700 leads, but have not named any suspects or people of interest.

PICTURES: Somer Thompson

October 27, 2009 - Somer Thompson Funeral: Little Girl Laid to Rest as Sky Fills with Purple
October 27, 2009 - More Than 1,000 Tips But No Leads in Somer Thompson Murder
October 26, 2009 - Somber Sendoff for 7-Year-Old Somer Thompson, Florida Girl Who Vanished After School
October 23, 2009 - Somer Thompson Pictures: Her Mother Vows Justice, A Community Vows Never to Forget
October 23, 2009 - In Somer Thompson Murder, Local Sex Offenders No Longer Suspects, Say Cops
October 23, 2009 - Somer Thompson's Mom to Killer: "We're Coming For You"
October 23, 2009 - How Police Found Somer Thompson and How They Hope to Catch Her Killer
October 22, 2009 - Somer Thompson Body Likely Found, Says Florida Sheriff
October 21, 2009 - Search for Missing 7-Year-Old Somer Thompson Leads to Body in Landfill
October 20, 2009 - Somer Thompson Vanished After School, Seven-Year-Old Girl Missing in Orange Park, Fla.