TUCSON, Ariz. -- Wednesday afternoon was the first time seeing and hearing from the parents of missing Isabel Celis.
"We're looking for you, Isa. We love you," Sergio Celis, Isabel's father. "We miss you so much and we will never give up looking for you."
The 6-year-old vanished from her Tucson home sometime between Friday night and Saturday morning.
"We are here today to plea for a safe return of our baby girl Isabel," her mother, Becky, said
So are FBI agents, who are now pairing with Tucson police detectives.
3TV watched on Wednesday as law enforcement spoke with neighbors, even the mailman.
"I don't want people to think we've given up the search aspect of this, scaled down dramatically," said Tucson Police Chief Robert Villasenor.
FBI behavioral analysts are in Tucson to help with this investigation. They plan on interviewing Isabel’s parents.
3TV got a hold of the nine-page questionnaire police are using to speak with neighbors.
One of the questions: "What have you noticed in the past two months that is suspicious or unusual?"
"This is a complex, tragic case and that’s we're trying to do the best we can with limited information," Villasenor said. "One thing we know for sure is that police found a window open and a screen off at the home Saturday."
"We don't want the focus to be taken off Isabel by us being in front of the cameras," Isabel's mother said.
"To the person or persons who have Isabel, tell us your demands, tell us what you want. We will do anything for her," pleaded Isabel’s father.
Isabel's parents spoke for just a few minutes, took no questions, and then walked away hugging.
They are leaning on each other for support, until their daughter comes home.
The reward for Isabel's safe return has been upped to $30,000.