New details have emerged about the 11-year-old boy who was charged last month with murdering a married couple in New Hampshire, including that the child was the victims' son whom they adopted from Russia as a toddler nearly a decade ago.

James Eckert, a 48-year-old chiropractor and ultramarathon runner, and his wife of nearly 22 years, 50-year-old Lizette Eckert, also a chiropractor, were fatally shot March 15 in their Alton home.

According to local police, the gunman was the 11-year-old boy who was arrested in nearby woods wearing a pair of pajama pants, but they have not provided the relationship between him and the Eckerts.

It is believed that James Eckert, 50 (top right), and his wife, Lizette, 48 (top center), were killed in March by the 11-year-old boy they adopted from Russia along with his older brother in 2010 (siblings pictured in front of Eckerts)

The husband and wife were shot dead inside their Alton, New Hampshire, home on March 15

However, the Eckerts' pastor has since disclosed to NBC10 Boston that juvenile suspect was their adopted son.

A new expose published by The Boston Globe shedding light on the secretive Eckert family and their long history of financial woes reveals that the parents, who also had a biological daughter, adopted the 11-year-old and his older brother from a Russian orphanage in 2010, when the boys were two and four years old, respectively.

The adoptions were arranged by the Indiana-based agency KidsFirst Adoption.

Russian laws require American parents to provide updates about their adopted children every year, but according to the head of the Indiana adoption agency, the Eckerts stopped doing that after three years.

The couple's friends and family have described the 11-year-old as happy but quiet and shy.

The two Russian siblings and their stepsister were all being homeschooled by their parents, who raised farm animals on their sprawling property, took part in Bible study and did not own a television.

James was a chiropractor and ultramarathon runner, and his wife (right) of nearly 22 years was also a chiropractor

According to the Globe, the Eckerts abruptly relocated to New Hampshire from Maine in 2012 after racking up hundreds of thousands of dollars in credit card debt, unpaid student loans and $550,000 in missed mortgage payments.

Pastor Sam Holo, of the Community Church of Alton, said that a few dozen parishioners were close to James and that he had known him for three years.

'He was a man of integrity,' Holo said in an interview. 'We’ve lost a good one in that sense.'

The two bonded, Holo said, over their Christian faith and their desire to live life as the Bible dictated. Eckert was also passionate about health and recently talked of starting a health website, he said.

James was pronounced dead after he was taken to a hospital in critical condition. Lizette was found inside the family's home with gunshot wounds. She was pronounced dead at the scene.

An autopsy revealed they both died from a single gunshot wound to the head. They were laid to rest on March 22.

Their 11-year-old son has been charged with second-degree murder