PUTNAM COUNTY, Fla. -- Is the last person who saw a missing Putnam County girl alive lying? Eyewitness News obtained the video taken while Misty Croslin-Cummings took a lie detector test (watch video | see images) to prove she didn't have anything to do with the disappearance of 5-year-old Haleigh Cummings.

The man who gave her the test says Misty failed it miserably.

"There's nothing I'm not telling you. I've told you everything that I know," she said during the polygraph test.

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POLYGRAPH TEST: Watch Video | See Images
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The man asking the questions just wanted to know what happened the night Haleigh Cummings vanished from her father's Putnam County home. At the time, Misty was the girlfriend of Haleigh's father, Ronald Cummings, and now she is his wife.

"Do you know anything about her going missing?" the polygraph administrator asked her.

"Nothing at all about Haleigh going missing," Misty replied.

The computer said that response was the truth. Misty, 17, told the story she's told so many times before; she put Haleigh and her brother to bed at 8:00 the night of February 9 and Misty went to bed at 10:00pm. However, out of nowhere, in the middle of night she awoke from a hard sleep.

"What did you notice when you woke up?" the administrator asked.

"I noticed the kitchen light was on," she replied.

Misty said she also noticed that the backdoor was open. She didn't notice, however, that Haleigh was gone until afterward.

"You need to think, you need to tell me the truth, because I can see changes. Okay?" he asked.

"Yeah," she answered.

Misty insists she's telling the only truth she knows.

"I have my suspicions, yeah," Misty said.

She says her brother Tommy and her cousin Joe are at the top of her list, but she doesn't have any proof they've done anything. Still, the computer didn't completely believe her.

"I can see there are things you're not telling me," the administrator stated.

"I'm 17 years old. Like, what do you think?" Misty replied.

"What do you think happened to Haleigh?" he asked.

"I don't know what's happened to her. I don't think she's dead," Misty replied.

The head of Texas EquuSearch, Tim Miller, set up the test after, he says, Misty came to him to ask for help with the search for Haleigh. Miller also sent her to undergo hypnosis (watch video) .

Lie detectors or the hypnosis tests are not admissible in court and investigators say there is nothing at this point to charge Misty with in connection with Haleigh's disappearance.

Haleigh was just five years old when she vanished from her Putnam County home. Her family marked her sixth birthday more than one week ago.