‘DWTS’ Contestant Nancy Kerrigan’s Brother Charged With Killing Dad In Drunken Brawl

Nancy Kerrigan might be sashaying her way through ABC's Dancing with The Stars ballroom on Monday nights — but will she talk about the deep family secret she's been hiding from fans?

A bombshell RadarOnline.com special investigation has uncovered shocking court documents that expose how the brother of the notorious figure skater was charged over the 2010 death of their father!

Mark Kerrigan was charged with manslaughter and assault and battery after their father died in 2010. A Middlesex County Supreme Court clerk confirmed the charges to RadarOnline.com.

Mark allegedly got into a fight with Daniel over the use of a phone and punched him to the brink of death, according to reports.

Prosecutors alleged that force Mark used sent Daniel into heart failure, but he was ultimately not found guilty of manslaughter. Instead, the jury convicted him of assault and battery and he was sentenced to two and a half years in jail.

Nancy and her mother stood by his side at the time and believed that Daniel's preexisting heart problems caused his death.

"My family has never believed that my brother had anything to do at all with my father's death, and my dad never would have wanted any of this," Nancy said when her brother was acquitted of murder.

Mark was released early from a county jail in 2012, but he asked the judge to send him back against his sister's wishes. His request was ultimately denied.

"He shouldn't have been charged," Nancy said on the TODAY show in 2013. "My dad had a heart attack and that's that."

"He's just getting on with his life," she added.

Now, Nancy is up to her own bad behavior on the Dancing With the Stars set.

"Nancy is really starting to make a lot of people angry because she is acting like she already knows what she is doing," a production insider told RadarOnline.com exclusively. "She is trying to choreograph her own routines and is just being incredibly bossy to the other contestants and to the production crew."