Croslin, now 19, is serving a 25-year sentence for drug trafficking.
Haleigh disappeared from the doublewide mobile home of her father, Ronald Cummings, on Feb. 10, 2009. Misty, who later married and then divorced Cummings, was babysitting the 5-year-old while Cummings was at work.
She said she woke up around 3 a.m. and discovered that Haleigh was gone. The back door of the trailer was propped open with a block, she told police.
In the videotaped interview with the Orlando Sentinel, Croslin says if she knew anything about the disappearance she would have told investigators a long time ago.
"I'm not the key to this at all." she said. "Because if I knew something, they would've known it from Day One. I just don't understand why they keep saying this about me."
"I know and God knows that I didn't do anything wrong. As long as I know, that's all that matters," Croslin said. "There are so many stories going around that it's unreal."
Connected to Drug Dealers?
"It's hurting me every day to know I was the last one with her," she said. "I've been locked down for 15 months trying to think of any little thing. There's nothing, though."
During the interview, Croslin said she believed Haleigh's disappearance may have been connected with Ronald Cummings' drug activities. She blamed him for getting her involved with drugs and said she was not a drug dealer.
"I cared for his kids," she said. "I'd give my life for Haleigh to come home now."
'Never Going to Give Up'
"It's been really hard, but I have to keep myself strong [because] I'm not going to give up," she said defiantly, adding that she isn't a drug dealer. "I'm going to fight to find Haleigh regardless. I'm never going to give up on her. The only reason I'm being strong right now is for her."
All of the others involved in the drug-sting bust for selling prescription pain killers received 15-year sentences, but Croslin got three 25-year sentences. Officials insisted that her drug case was not related to the Haleigh Cummings investigation.
More than two years after her disappearance, no trace of Haleigh has ever been found.
Photo: Mug Shot