He is charged on three counts, each of which carries a possible life sentence.
Mr. Wagner is charged with two counts each of attempted murder, assault and aggravated harassment.
Prosecutors added a charge of unlawful imprisonment and five counts each of burglary and malicious harassment.
Both parents pleaded not guilty to five counts each of child endangerment, the Associated Press reported.
Mr. Nevarez, 54, was charged with 16 counts each of possession of a forged instrument and of tampering with evidence.
After the interview she was formally charged with two counts each of first- and second-degree murder.
Pyatt, 51, also of Windsor, was charged with two counts each of the same offence.
He has been charged with two counts each of reckless endangerment and endangering the welfare of a child.
"She was arrested, arraigned and charged with two counts each of petty theft and possession of stolen goods.
Mr. Eriksson, 44, was charged with two counts each of grand theft and fraudulent concealment with intent to defraud.
They were sent to New York to face eight counts each of kidnapping -- one per child -- among other charges.
