Late Thursday, teams from the Orange County Sheriff's Office brought digging equipment to Cindy Anthony's home and scoured the backyard with cadaver dogs. Investigators moved a playhouse from its spot in the yard and were looking at the ground beneath it. Investigators are trying to unravel the web of lies that they say the girl's mother, 22-year-old Casey Anthony, has told about her daughter's disappearance nearly five weeks ago.

"As we continue to investigate this, we find more inconsistencies in the mother's story, so we continue to look for witnesses," Orange County sheriff's Sgt. John Allen said Thursday. But one investigator put it more bluntly in Anthony's arrest affidavit:

"Based on the repetitive lies that the defendant has told, we do not know with whom the child is or even if the child is alive," wrote Cpl. Yuri Melich of the missing-persons unit. "It should be noted that at no time during any of the above interviews did the defendant show any obvious emotion as to the loss of her child."

Casey Anthony reported Caylee missing Wednesday --- after Cindy Anthony urged her to contact authorities.

Casey Anthony told officials that she dropped her daughter off with a baby sitter she identified as Zenaida Gonzalez on June 9 but that the child was gone when she returned to pick her up. Investigators have questioned a Zenaida Gonzalez who said she had never met Anthony or Caylee. Detectives are looking for other women with the same name.

The Sheriff's Office arrested Anthony late Wednesday on charges of child neglect, providing false official statements and obstructing a criminal investigation.

Detectives spent Thursday talking with possible witnesses and following up leads, including seizing electronic equipment from the Anthony home. Crime-scene investigators carried a large item out of a house next door on Hopespring Drive. Casey Anthony and her daughter had lived with her parents at their Lee Vista home until June 9.

While deputies searched for Caylee, Casey Anthony remained locked up at the Orange County Jail. Investigators did not question her further Thursday.

"We can't compel [Casey Anthony] to give us more information," Allen said. "She has the right to not talk to us about it. But certainly as the mother, I would hope she would be willing to give us whatever information she had to help us find her child."

Orange County Judge John Jordan denied Casey Anthony bail Thursday, chastising her behavior.

"You left your 2-year-old child with a person who does not exist at an apartment you cannot identify and you lied to your parents about your child's whereabouts," Jordan said. "You cared so little about your child."

Casey Anthony, who has no criminal record, nodded as Jordan spoke. The judge ordered a mental-health evaluation.

Casey Anthony, investigators say, wove a trail of lies that has left them with little information and her own family puzzled.

"At this point, there is no indication that [Caylee] is deceased," Capt. Angelo Nieves said. "We don't know where she is. Our concern is for the child and to locate her."

Authorities have not issued an Amber Alert for the girl because the information they have does not meet the criteria, Nieves said. Detectives say they are challenged in the investigation because so much time has passed since she was last seen.

"If we had been called the day she disappeared…it would have been much easier to find the child," Allen said.

Ernie Allen, president of the National Center for Missing & Exploited Children, said "time is the enemy in these cases. However, the greatest challenge faced by law enforcement is the delay in starting the investigation."

Cindy Anthony can't explain the lies her daughter told family and the authorities.

In early June, Casey Anthony told her mother she was being sent to Tampa for work and would be back in a few days. Later, she said she was going on a "mini-vacation" with friends and taking Caylee with her. Cindy Anthony never thought much of it.

Casey Anthony told detectives she worked at Universal Studios and identified people who could vouch for her --- another lie. The apartment Casey Anthony identified as the place she left her child with Gonzalez in June has been vacant for five months.

"I had no reason to believe they weren't where they were supposed to be," Cindy Anthony said. "I don't know why she fabricated this."

Anyone with information about Caylee is asked to call Crimeline at 1-800-423-8477.