Law enforcement officials drained a well and issued subpoenas to local media outlets for interview footage connected with the disappearance of ten-month-old Lisa Irwin of Kansas City, Mo., this week, as hopes that Irwin will be returned safely begin to fade.

Lisa is believed to have disappeared from her crib sometime the night of Oct. 3 or the early morning hours of Oct. 4, and was last seen by her mother, Deborah Bradley, at approximately 10:30 p.m. last Monday night.

Lisa's father Jeremy Irwin reportedly discovered the baby was missing when he returned home from a late shift at work in the early hours of Tuesday morning.

The windows were open and lights were on and she was nowhere to be found, Irwin told Good Morning America Thursday. We've been going over everything in our minds. We just don't have any idea.

On Tuesday, Kansas City firefighters searched a well underneath the porch of an abandoned home on the advice of a tipster. But the search turned up no new evidence.

On Monday, Grand jury subpoenas were sent to multiple Kansas City television stations, requesting all footage, including raw footage of any interviews or statements given by neighbors, family or friends of the family, regarding missing baby, Lisa Irwin.

Jim Roberts, a spokesman for the prosecutor's office, told the Associated Press that the subpoenas were needed to prevent broadcasters from destroying video in the event it might be needed at a future date.

R. Michael Cassidy, a professor at Boston College Law School, told MSNBC there could be several reasons for seeking the footage  -- including an attempt to identify inconsistencies in Lisa's parents' accounts of the events surrounding her disappearance.

It could mean that they have one or both of the parents as suspects, and they are developing evidence of everything they said in the past and prior to the arrest, Cassidy told MSNBC Tuesday. To show that someone's story has shifted over time can also be very damning.

Lisa's aunt told the media that Bradley was preparing to be arrested for Lisa's disappearance, though the baby's mother has maintained she has no idea what happened to her daughter.

It's what the police do, Ashley Irwin told Good Morning America. They don't have any leads so they just have to pin it on somebody.

Kansas City police denied any plans to arrest Bradley, or anyone else.

We don't feel any pressure to accuse anybody, Kansas City police spokesman Capt. Steve Young told the Kansas City Star. We are under pressure to do what we can to find a child.

On Sunday, police and FBI staged a re-enactment of Lisa's disappearance at the home she shares with her parents and their young sons from previous relationships.

The staged break-in was undergone by investigators to test the story told by Lisa's parents, according to ABC News.

On Friday, FBI investigators spent two hours searching the Deffenbaugh Industries landfill in a Kansas City suburb. FBI spokeswoman Bridget Patton told ABC News that search was related to missing baby Lisa's case, but did not provide any further details.

The same landfill was searched on Tuesday, the day Lisa Irwin was first reported missing.

Relations between Kansas City police and the 10-month-old infant's parents, Jeremy Irwin and Deborah Bradley, became strained late this week -- with investigators beginning to paint a picture of the young couple as being uncooperative and unreliable.

Bradley and Irwin went on the Today show Friday to discuss the ongoing investigation to find their daughter -- which has turned up few leads and no official suspects.

Matt Lauer opened the interview by telling Lisa's parents that in the numerous missing children cases he has covered, he has rarely seen the police make a statement that the child's parents are uncooperative --  an accusation Kansas City Police aimed at Irwin and Bradley, an unmarried couple who each have children from previous relationships who live with them

In a press conference Thursday evening, Capt. Steve Young said Lisa's parents were no longer cooperating, which may or may not have been a misinterpretation of their request for a break from being questioned.

We were at the station yesterday being interviewed again, and I just had reached my boiling point and asked them, 'Guys, I can't do this anymore today, I need a break, [and] I can't answer any more questions,''' Irwin, 28, told Lauer. The next thing we knew was the press conference yesterday. We want to make sure that we tell everybody that we're still cooperating, we're still talking to police, [and] we're still doing everything we can to try to find Lisa and bring her back home.''

Only Bradley has taken a polygraph test -- which she said she volunteered to do. Police told her she failed, but Bradley did not recall which questions she was believed to have answered falsely.

Irwin told Lauer he had not been asked to take a lie detector test, which prompted the host to ask if he would be willing to do so. Irwin gave an affirmative, if somewhat vague, response.

I'd be willing to do whatever it takes to bring my daughter Lisa home where she belongs, he said.

Lauer asked Bradley if she believed the police calling [her] out was an attempt to pit husband and wife against each other.

Bradley answered after a brief hesitation. Possibly, she said. She later added, our concern is to find Lisa and bring her home...I don't care what we have to go through to get it.

The parents addressed the situation on Good Morning America as well.

From the start when they've questioned me, once I couldn't fill in gaps, it turned into 'You did it, you did it,' Bradley told GMA Friday. They took a picture down from the table and said, 'Look at your baby! And do what's right for her!' I kept saying I don't know ... I just sat there. I didn't even ask to leave. I just let them keep asking questions.

Suspicion almost always falls heavily on the parents, especially when it's young kids, David Finkelhor, director of the Crimes Against Children Research Center based at the University of New Hampshire, told ABC News.

For a parent who has been a victim of a true stranger abduction, this is devastating. You're dealing with the loss of a child, and police are considering you as one of the prime suspects, Finkelhor said. You can get non-cooperative because the family is feeling mistreated by police.

Communication between Kansas City police and baby Lisa's parents has since been restored, and Bradley and Irwin are again meeting with investigators, according to ABC News.

On Monday, Police told ABC News that over 250 tips had come in.

We're chasing down the ones we can but still unfortunately nothing has really come from them, Young said.