updated 10/17/2011 AT 6:00 AM ET
•originally published 10/17/2011 AT 6:30 AM ET
On the night her 10-month-old daughter disappeared, Lisa Irwin’s mother drank enough wine at home while relaxing with a neighbor that she has no recollection of whether or not she checked on her daughter or turned off the house lights before she went to bed.
Did the alcohol cause her to black out? “It’s a possibility,” Deborah Bradley tells Fox News Channel.
On Sunday, 25 members of the Missouri National Guard scoured areas searched previously by police and FBI agents for clues regarding the whereabouts of Baby Lisa, whom her mother says was snatched from her crib in the hours prior to 4 a.m. Oct. 4.
That’s when Lisa’s father, Bradley’s fiancé Jeremy Irwin, returned home from a late work shift to find a front window open, the front door unlocked, several inside lights on and their daughter missing.