Relatives of Lisa Irwin, a 10-month old baby who was allegedly stolen from her crib, posted home videos of the infant on YouTube to help the search.
The missing girl's parents, Jeremy Irwin and Deborah Bradley, say their daughter vanished from their Kansas City home on Oct. 4. Irwin told police when he came home late at night from a work shift, lights were on in the house and a window had been tampered with.
At the time of the recordings, the infant was about three months old and appears to be happy while her mother coos to her off-camera.
A cousin, speaking on behalf of the family, expressed thanks to the volunteers who have turned out in large numbers to assist in the search for Baby Lisa, The Kansas City Star reports.
The family also hired a New York City private detective, Bill Stanton, who said he planned to reveal on Friday that another prominent figure had joined the search team, The Star says.
Stanton also announced a $100,000 reward that will be offered for the return of the missing infant or leads that aid in the conviction of individuals involved in the child's disappearance, the Associated Press reports.
SEE PHOTOS FROM THE SEARCH FOR BABY LISA: