Police and deputies spent several hours Tuesday searching the desert north of Davis-Monthan Air Force Base for anything of "evidentiary value" related to the Isabel Celis case.
The search team scoured the area on the northern side of Golf Links Road near South Swan Road, said Sgt. Maria Hawke, a Tucson police spokeswoman.
The team comprised some 25 Tucson police officers and Pima County sheriff's deputies from the Rapid Response Team, and two K-9s.
The area is about three miles from the Celis family's home in the 5600 block of East 12th Street, where 6-year-old Isabel was reported missing on April 21.
The area searched is also less than a mile from Freedom Park, 5000 E. 29th St., where Isabel was with her family the night before she disappeared.
Isabel and her brothers, Sergio, 14, and Julian, 10, spent many mornings and nights at Freedom Park as Little League players. Their mother, Becky Celis, was their biggest fan, friends have said. And their father, Sergio Celis, was the coach for Julian's team.
Isabel was expected at Freedom Park at 9 a.m. for a baseball game the morning she disappeared.
Police are investigating Isabel's case as an abduction, but so far have not identified any suspects. Isabel's parents still have not been ruled out as suspects in the case, and are being asked "very pointed questions now," Police Chief Roberto Villaseñor said Monday.
On Friday, Sergio Celis voluntarily entered into an agreement with Child Protective Services to not make contact with his two sons, after detectives developed information pertaining to the welfare of the boys and shared it with CPS. The boys are now staying with their mother, Villaseñor said.
Tuesday marked Day 25 of the investigation into Isabel's disappearance. Police continue searching areas they have scoured before around town, said Hawke.
"It's not anything out of the ordinary that they're doing," she said of Tuesday's search in desert near the military base. "They have been consistently re-searching areas as information has developed."
Some areas have been searched as many as four or five times, she said.
"It's something we revisit consistently, and we will continue to do so as we conduct the investigation," Hawke said.
She would not comment specifically on what information led officers to this particular area again.
More than 1,000 leads have been reported.
The 88-CRIME reward for information leading to an arrest in Isabel's disappearance is $50,500.