NEW PHILADELPHIA, Ohio (WJW) — An Amish woman indicted on murder charges following the deaths of her 4-year-old son and 45-year-old husband pleaded not guilty by reason of insanity Monday.

Last week, a grand jury indicted Ruth Miller, 40, of Millersburg, Ohio, on seven counts, including aggravated murder, endangering children and domestic violence.

Miller sat quietly during an arraignment in New Philadelphia on Monday, as her attorney confirmed for the court that they are pleading not guilty by reason of insanity to the charges.

“Based upon the facts … this case would not have happened but for a mental defect that would have prevented Miss Miller from appreciating the wrongfulness of her conduct,” said defense attorney Ian Friedman.

According to investigators, Miller is believed to have been experiencing a “spiritual delusion” when she allegedly threw her 4-year-old son, Vincen Miller, into Atwood Lake on Aug. 23.

Miller’s 45-year-old husband, Marcus Miller, is also believed to have drowned after swimming into the lake on his own accord, reportedly as part a religious test, according to investigators.

The bodies of Marcus and Vincen Miller were recovered from the bottom of the lake by dive teams.

Body camera video obtained by affiliate WJW shows Miller speaking with a ranger at the scene. When she was asked where her son was, she said, “I gave him to God.”

Miller also crashed a golf cart into the lake with her 15-year-old daughter and twin 18-year-old sons on board.

“There clearly was a serious mental disease that she faced. It was evident to the first responding officers, the first responders and unfortunately it was a tragedy that happened that day,” Friedman said. “People generally think that if someone is found not guilty by reason of insanity, they’re just released to the street. They are released to the custody of a lockdown hospital.”

The indictment, handed up Thursday, brings seven total counts: individual felony counts of aggravated murder, murder and felonious assault in the death of her 4-year-old son Vincen Miller; and three misdemeanor counts of domestic violence and one misdemeanor count of endangering children related to the crash involving her older children.

She faces a minimum sentence of 20 years to life in prison if convicted on the aggravated murder charge.

On Monday, Judge Michael Ernest ruled that Miller will be held in the county jail until a bond hearing can be held later this month. He also ruled that at this point, she can have no contact with her three surviving children.