Everlyse Cabrera Child first reported missing by her foster parents on Saturday

It is appearing less likely that 2-year-old Everlyse Cabrera left her North Las Vegas foster home and disappeared on her own, authorities said Wednesday.

"We haven't ruled out anything, but it's getting harder to think she walked out on her own and wasn't contacted by anyone," North Las Vegas police spokesman Tim Bedwell said. "At 2 1/2, she couldn't have gone far."

A thorough search of 12 square miles surrounding her foster home has been conducted, he said. No trace of her has been found in that area, he said.

Everlyse was first reported missing about noon Saturday. Sometime after 1 a.m. Everlyse reportedly used a stool to climb up to and unlock a deadbolt on the front door and left the foster home where she was living in the 6500 block of Diamond Point Court, near Centennial Parkway and Clayton Street, police have said.

When she was put to bed, Everlyse was wearing a pink T-shirt, pink shorts and no shoes, the foster family told police. The foster mother discovered the dark-haired, brown-eyed toddler was missing about 8 a.m.

In the meantime, the names of the adults living at 6513 Diamond Point were released by police on Wednesday.

Manuel Carrascal, 57, and his wife, Vilma Carrascal, 54, were identified as the foster parents. They have two children Melvin Balane, 34, who owns the home, and a 14-year-old boy.

Following Everlyse's disappearance, child welfare officials removed her 11-month-old brother who also was living at the foster home.

The foster family stopped cooperating with the investigation on Monday, after they were brought in for more interviews. Bedwell said, however, "That's their right and they opted for that. We have to respect that. I'd prefer people not read too much into that." He added they are not suspects and are welcome to talk with police anytime.

Bedwell said investigators are looking at five major scenarios surrounding Everlyse's disappearance: she walked away on her own; she walked out of the foster home and was abducted by someone; someone came into the home and abducted the girl; she was abducted by a relative; or something happened to her inside the foster home.

Investigators have not been able to determine if anyone outside of the foster family has seen Everlyse since May 15, Bedwell said. Investigators urged anyone who saw the girl after May 15 to contact authorities.

Bedwell said the investigation is still young.

"We are four days in and I am not prepared to look at worst case scenarios," Bedwell said. "There still is a great deal of optimism among the investigative team."

Meanwhile, two investigators from the National Center for Missing and Exploited Children have joined the investigation. They are Dave Hatch, a former homicide detective with the Metropolitan Police Department, and Paul Burke, who worked search and rescue efforts in Alaska.

Both have reviewed the efforts of the North Las Vegas police and said they were impressed with the thoroughness of the investigation.

Anyone with information can contact 1-800 THE-LOST (843-5678) or Crime Stoppers at 385-5555. Urgent tips can be made to the Police Department's main line at 633-9111 or to 911.