Kansas City, Missouri (CNN) -- Two anonymous benefactors have offered a $100,000 reward for the safe return of missing Missouri infant Lisa Irwin, a private investigator working for the family said Friday.
The search for Lisa entered its 11th day Friday, with police in Kansas City no closer to locating the girl, who turned 11 months old this week.
For a second day, police scoured a wooded area near Missouri Route 210 on Thursday looking for clues. They did not say what they found.
Also Thursday, the family released home videos of Lisa, taken in March, in which she smiles and gurgles in some.
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"Who are you talking to?" a woman's voice asks. Lisa babbles in response, prompting laughter.
Police, who were joined in their search effort by federal authorities last week, have said they have no suspects or solid leads in Lisa's disappearance.
Irwin's family announced Tuesday that they had brought in Bill Stanton, a prominent private investigator, to help with the search -- a high-profile twist in a case that has gripped national headlines.
Stanton told reporters Friday afternoon that the reward is either for Lisa's safe return or information leading to the conviction of persons involved in the crime.
Stanton is a former New York City police officer who has served as a security consultant for several television networks. He said his role is to help "coordinate and focus the family" in both the investigation and in its dealings with the media.
On Thursday, he told reporters that one of the reasons the family has stopped speaking to the news media is because some of the facts in the case had been twisted.
For example, surveillance video recorded at a grocery store hours before Lisa disappeared shows the girl's mother, Deborah Bradley, and a man purchasing items.
"You know, while most of the journalists here are doing a really good job, sometimes things get spun," Stanton told CNN affiliate KCTV.
"We all heard about that guy in the video. It was the boyfriend. It was the lover," he offered as examples.
But it was not, Stanton said.
"It was the brother" -- Bradley's brother, Stanton said.
Authorities had expressed frustration recently after Lisa's parents had stopped cooperating with investigators, police Capt. Steve Young said. However, a family spokeswoman attributed the frustration to "miscommunication," and a subsequent meeting with the parents was held Saturday.
Lisa was last seen around 10:30 p.m. October 3, asleep in her crib, police said. Authorities were called to the home about 4 a.m. October 4.
Lisa's father, Jeremy Irwin, told reporters that he discovered the girl was missing when he got home from work.
"The front door was unlocked," he said last week. "Most of the lights were on in the house, and the window in front was open -- all very unusual."
Three cell phones were also reported missing at the home, Young said.
Lisa is described as 30 inches tall with blue eyes and blond hair, police said. She weighs between 26 and 30 pounds and was last seen wearing purple shorts and a purple shirt with white kittens on it.
The missing girl has two bottom teeth and a "beauty mark" on her right outer thigh. She had a cold with a cough, police said.
CNN's Bill Kirkos, Ed Lavendera, Leslie Tripp and Karan Olson contributed to this report.