Ms. Lanza divorced her husband, Peter Lanza, in 2009 after a long separation, a relative said.

WSJ: Portraits of Newtown Victims

Peter Lanza released a statement Saturday expressing condolences to the families of victims.

CNN: STORY HIGHLIGHTS

Peter Lanza was taken in for questioning, but there was no indication he would face any charges, one U.S. law enforcement official told CNN.

CNN: STORY HIGHLIGHTS

While Adam's father Peter Lanza, a tax director and vice president for GE Energy Financial Services, was outgoing, Nancy could be "unsociable, " Mary Ann Lanza said.

WSJ: Suspect, Mother Come Into Focus

Peter Lanza is tax director and vice president of taxes for GE Energy Financial Services in the New York City area, according to his resume posted on the website LinkedIn.

CNN: STORY HIGHLIGHTS

The newspaper quoted an unidentified neighbor as saying Peter Lanza and his new wife, who has been living in the neighborhood for at least a decade, were married fairly recently.

CNN: STORY HIGHLIGHTS

Peter Lanza didn't respond to requests for comment.

WSJ: Suspect, Mother Come Into Focus

Outside Peter Lanza's home in Stamford, Conn.

WSJ: Suspect, Mother Come Into Focus

Nancy Jean Lanza sued Peter John Lanza for divorce on November 24, 2008 -- three days before Thanksgiving, Connecticut court records show.

CNN: STORY HIGHLIGHTS

That county includes the town of Kingston, where Adam Lanza's father, Peter, was raised.

CNN: STORY HIGHLIGHTS