The mother of a baby whose body was found in a vacant field in Eldorado this week says the infant was stillborn, according to the Santa Fe County Sheriff’s Department.

A Friday autopsy performed by the state Office of the Medical Investigator in Albuquerque did not provide an official cause of death, but Maj. Ken Johnson said the mother, who is not being charged, says she had a stillbirth.

Further autopsy tests will be performed over the next several weeks. Johnson also confirmed last week that no one else was involved in disposing of the body of the baby, who was determined to be in the 35th week of fetal development. (An earlier report said the unearthed infant was 35 weeks old.)

The 21-year-old mother has retained Santa Fe attorney John Day.

Day represented Katrina Vigil, then 25, in a 2011 case in state District Court before Judge Michael Vigil (no relation), in which Katrina Vigil’s son died 11 days after his birth in Los Alamos in October 2010.

An autopsy showed Katrina Vigil’s son was born without a cerebral cortex and likely would have died even if he had received medical care. State prosecutors in the case, however, said that regardless of the autopsy findings, they had serious concerns about the actions of Katrina Vigil, who gave birth to the boy in secret and didn’t seek medical attention.

Judge Vigil ruled there was no probable cause to charge Katrina Vigil with child neglect or abuse for the death.

On Thursday, an Eldorado resident discovered the remains of the stillborn baby while on a walk with his two small dogs. The remains were partially visible, and the man could discern a leg and foot. He immediately called authorities.

“There are not going to be any charges filed at this point,” Johnson said last week. “We will wait until the final results from the autopsy and forward the findings to the District Attorney’s Office.”

Day said Saturday that he is convinced there is no need to charge the mother with a crime.

“It’s a tragedy for the family, but there is no crime here,” Day said.

Contact Nico Roesler at 986-3089 or nroesler@sfnewmexican.com. Follow him on Twitter @nicoroesler.