Police and FBI agents performed a crime scene reenactment to test what the parents of baby Lisa Irwin say happened the night she went missing. They say that an intruder climbed into a window and snatched Lisa from her crib.
Officers also used metal detectors to search the front yard of the house in Kansas City, Missouri.
Their work continued after nightfall. Using flashlights, they climbed on the roof of the house and searched the gutters for clues.
ABC News correspondent Dan Harris got an exclusive look inside the house and gave viewers a tour of the nursery where Lisa's mother put her down to sleep in her crib before she went missing.
Meanwhile, Lisa's parents, Deborah Bradley and Jeremy Irwin, were bombarded with questions when they showed up to tape an interview with Fox News's Jeanine Pirro.
Bradley, who apparently failed a lie detector test, stuck to her story that a stranger abducted the child.
"We just got up and started screaming for her, looking everywhere, she wasn't there," Bradley said tearfully.
As the couple left after the interview, they were again peppered with questions. Irwin clutched the Barney doll they say was Lisa's favorite.
They were not eager to do any interviews. Bradley told a reporter, "We can't right now."
Instead, they climbed into the backseat of a car and let Jeremy's father describe the family's anguish:
"You can't sleep, you can't eat, your mind is—you're physically, you're mentally, you're emotionally exhausted," he said.
Lisa's parents handed him a missing child poster, but they remained sitting quietly in the backseat. They looked tired and emotionally drained and didn't talk to each other.
The posters were handmade by the missing girl's two big brothers.
"They've had a couple of little breakdowns because they miss their sister," Jeremy's father said.
Police say the couple is now answering police questions again, after last week's uproar over revelations they had stopped cooperating.
They insist they had no role in their daughter's disappearance.
It's also being reported that Lisa's mother is actually married to another man, serviceman Sean Bradley. They have reportedly been separated for four years but never officially divorced.