Joshua Davis Jr. Missing: Texas Toddler Mysteriously Disappears from Home Full of People

(CBS/KENS/AP) Police aided by state officers and bloodhounds continued searching for 18-month-old Hill Country child Joshua Davis Jr., who was reported missing by his family Friday evening.

New Braunfels police Lt. Michael Penshorn says searchers removed the skirts Monday from the crawlspaces beneath the homes in the mobile home park where the family lives. Penshorn says a parallel criminal investigation also is under way into the circumstances behind the boy's disappearance.

"We have been receiving some tips throughout the past several days," Penshorn told CBS affiliate KENS. "As we get those tips, we're following up with them specifically, whether it's a search team checking a specific area or just interviewing someone that may know something in relation to this case."

The 18-month-old vanished at about 8 p.m. Friday. He was last seen inside the family's mobile home with six other people.

The family believes someone may have snatched him, reports KENS.

Penshorn said he had no information on the details, but the family was cooperating.

Penshorn had said Sunday that the search had changed to a recovery effort after hopes dimmed for the child after a weekend of subfreezing weather.