PLEASANT GROVE, Utah — Police in Utah are questioning a mother and family members about the killings of seven babies whose bodies were found stuffed in cardboard boxes in a garage.

Megan Huntsman, 39, is accused of killing her babies after giving birth to the children between 1996 and 2006, investigators said. She was booked Sunday into the Utah County Jail on six counts of murder. It wasn’t immediately clear if Huntsman has an attorney or why there were six counts and not seven.

The gruesome case has raised a series of questions about how the killings occurred despite Huntsman carrying out what neighbors said seemed like a normal existence. Police declined to comment on a motive and on whatHuntsman said during an interview with investigators.

Her estranged husband made the discovery while cleaning out the garage after recently getting out of prison. Authorities do not believe he was aware of the killings and he isn’t a person of interest at this time.

Police Capt. Michael Roberts said officers responded to a call from him Saturday about a dead infant, and then they found the six other bodies.

Family and neighbors identified the estranged husband as Darren West, who has been in prison on drug-related charges.

Roberts said police believe West and Huntsman were together when the babies were born.

“We don’t believe he had any knowledge of the situation,” Roberts told The Associated Press

Asked how West could not have known about the situation, Roberts replied, “That’s the million-dollar question. Amazing.”

The babies’ bodies were sent to the Utah medical examiner’s office for tests, including one to determine the cause of death. DNA samples taken from the suspect and her husband will determine definitively whether the two are the parents, as investigators believe.

Huntsman also has three daughters — one teenager and two young adults — who lived at the house.

Neighbors in the middle-class neighborhood of mostly older homes 35 miles south of Salt Lake City say they were shocked by the accusations and perplexed that the woman’s older children still living in the home didn’t know their mother was pregnant or notice anything suspicious.

Police say West made the grisly discovery at the house owned by his parents in a city of about 35,000 people at the foot of snow-capped mountains. It’s a nondescript, newer home with a brick facade and a star ornament hanging by the door.

Several police cars blocked the entrance to the house Sunday evening as officers milled about with the belongings from the garage strewn across the front lawn.

Late Sunday, West’s family issued a statement saying they were in a “state of shock and confusion.”

“We are mourning this tragic loss of life and we are trying to stay strong and help each other through this awful event,” the statement said before asking for privacy.