SARASOTA, Fla. -- The FBI and state law enforcement officers joined the search Tuesday for an 11-year-old girl whose apparent abduction was videotaped by a car wash surveillance camera.

FBI spokeswoman Sara Oates said one agent is assisting the Sarasota County Sheriff's Office with the investigation of Carlie Brucia's disappearance but others may also help, she said.

"We are offering our assistance and anything they need to locate her," Oates said.

The Florida Department of Law Enforcement is also assigning an agent to the case, spokesman Larry Long said.

Carlie, who is about 5-feet-tall and 120 pounds, has blond hair and blue eyes. She was last seen wearing a red top and blue jeans, and carrying a pink backpack.

Carlie was walking home from a friend's house about 6:20 p.m. Sunday when she cut behind Evie's Car Wash, which was closed. Tape from the business's surveillance camera shows a white male in his late 20s or early 30s approach her. She did not appear to know him.

See Video Of Girl's Abduction

The man, who was wearing a mechanic's shirt with a name patch on one breast, spoke to her for a few seconds, then grabbed her by the arm and lead her away. Her parents say they don't recognize the man.

Her stepfather, Steven Kansler, had driven to the area to give her a ride after a friend's mother had called to say she had seen Carlie walking home.

When he didn't find her, he called the sheriff's office about 6:30 p.m. A search did not locate her. The car wash's owner checked the tape Monday and found the images of her abduction, which have been broadcast nationwide.

Joe Brucia, the girl's father, said detectives have told him that they have interviewed some people, but have no prime suspect. Investigators have called a Tuesday afternoon press conference to discuss the case.

"To the man who abducted her, you've done a considerable amount of damage," Brucia said on NBC's "Today." "Please stop. Release my daughter. Let her go. With some help and some love she can heal. Give us back our daughter."

"I need her," said Susan Schorpen, the girl's mother. "She's loved and she's special. She needs to come home. Carlie is a wonderful, kind little girl. Carlie needs to be home with her family. We desperately need her. Please release Carlie. Please give me my baby."

Robert Hagemann, principal at McIntosh Middle School where Carlie is a sixth grader, said the girl is personable and animated and has many friends. "She is a delightful young lady."

He said that the school has increased security and district counselors were meeting with students.

He said many of the children are sad, frightened and shocked. He said students are being encouraged to discuss their feelings but to also remain hopeful that Carlie will be found. School officials are also being encouraged to "think optimistically and have a plan to celebrate and to also have a plan if the news is tragic."

Anyone with information that could help in the case is asked to call the Florida Department of Law Enforcement at (888) FLMISSING or the Sarasota County Sheriff's Office at (941) 861-4260.