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OTRC: Mindy McCready on taking her son: 'What I did was to protect my child' - See video

Country singer Mindy McCready appears in a December 2011 interview for '20/20.'

In a new interview set to air on "20/20" on Friday, country singer Mindy McCready opens up about her decision to break a custody order and take her son Zander from her mother's legal custody in Florida and travel with him to Arkansas.

"What I did was to protect my child, and there's not a person in the world that's going to tell me that that is wrong," she said in the interview with ABC News, which can be seen in the preview below.

The singer made headlines last week when she took the 5-year-old boy from her mother's custody to Tennessee on November 29. A judge ruled she violated a custody agreement. McCready's mother, Gayle Inge, was awarded guardianship of Zander in 2007 following McCready's trouble with the law. The judge ordered McCready to return Zander to Florida on December 1.

McCready then revealed that she was not going to return Zander because she was unable to travel due to the fact that she is seven months pregnant with twins. On December 2, McCready and Zander were found "hiding in a closet" by U.S. Marshalls in Heber Springs, Arkansas.

"He was screaming, 'Please don't touch me, please don't touch me, please don't touch my mommy. Please, leave me alone, I want to be with my mommy,'" McCready said about the event, which she claims the Marshalls came with a SWAT Team-like force into the house.

"There was no forced entry made. No battering ram," David Rahbany, Chief Deputy U.S. Marshall for the Eastern District of Arkansas told ABC News.

"I know there are rules that are written down that we're supposed to follow, and guidelines that we're supposed to follow, but there's a difference between right and wrong, and right and wrong in my opinion should come first, always," McCready said.

The 36-year-old singer has dealt with domestic abuse, drug and DUI arrests as well as a suicide attempt since the mid-1990s, after she released her double platinum debut album "Ten Thousand Angels" in 1996.

She was arrested in 2007 for getting into a fight with her mother and resisting arrest. In 2008, McCready was admitted to a Nashville hospital for a suicide attempt after police said she cut her wrists and took several pills. McCready appeared on the third season "Celebrity Rehab" in 2010.

McCready's interview airs on Friday, December 9, on "20/20" at 10 p.m.Check out a preview of the interview below.

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