TUCSON, Ariz. -- Friday marks one week since 6-year-old Isabel Celis vanished from her home.
Tucson police said underwater searches have turned up no sign of her.
Police are now looking for anyone who took video during a baseball game that Isabel's family attended the night before she disappeared.
Neighbor Alicia Stardevant lives next door to the family's home; a wall separates her bedroom from Isabel's. On Saturday she woke up to noises outside her window.
"I noticed two male voices outside my bedroom window and I also noticed their dogs just going crazy, too," Stardevant said. "I didn't really think anything of it because it was light outside and I thought maybe someone was going for a walk."
Stardevant told CNN's Nancy Grace she wished she had paid closer attention because there shouldn't have been anyone in the breezeway between the two properties.
Stardevant added that everything seemed to be normal at the Celis' home, which she's lived next door to for the last eight months.
"No strange activity, no strange cars, just seemed like a quiet house," she said.
Investigators continue to gather potential evidence at the home and comb through leads even though there has been no break-though in the case.
"We conducted four complete canvasses, of this area in a three-mile wide radius, went back several times. And we continue to do that to this day," said Lt. Fabian Pacheco with the Tucson Police Department.
The worry is with each passing day, the likelihood of finding Isabel -- dead or alive -- dwindles, as resources and media attention dry up.
"It's very difficult to mount these big searches. Most children, if they've been missing, have been murdered or found within a five-mile radius of their home or a 100 miles away," John Walsh, host of "America's Most Wanted" told Tucson station KOLD over the phone. "There isn't the money, the time. The law-enforcement agencies don't have the resources and the reality becomes that even though your child is missing, now they're just a poster, now they're just a picture."
There is a $30,000 reward for information that leads to Isabel Celis.