EL PASO, Texas -

Legal documents state that the father of 5-month-old Jackson Farrey told his father the child died after choking on something and that he and the boy’s mother buried the child in the desert.

Jackson’s parents are both still in custody in the El Paso County Jail. Jeffrey has been indicted on charges of injury to a child by omission and Jenna Farrey remains jailed on a charge of violating probation stemming from Jackson’s parents are both still in custody in the El Paso County Jail.

Jeffrey has been indicted on charges of injury to a child by omission and Jenna Farrey remains jailed on a charge of violating probation stemming from a case in which she abandoned her older child – 20-month-old Blake.

According to the legal documents, police interviews with the family revealed that 5-month old Jackson Farrey was not with them. Both parents claimed that the infant was staying with grandparents. Investigators made contact with all grandparents and learned that the infant was not with them.

Jenna Farrey, Army Spc. Jeffrey, and their children, Blake and 5-month-old Jackson were reported missing Nov. 15 in El Paso. All but Jackson were found in an Escanaba, Michigan motel on Nov. 17.

A body was found a few days later in the desert near Orogrande, New Mexico that authorities believe is Jackson's body.

Timeline of Events

Jeffrey rents a U-Haul on Nov. 1, 2013.

Jeffrey appears to be traveling alone when he passed through the Alamogordo Border Patrol checkpoint at 4:36 a.m. on Nov. 13, 2013.

On Nov. 16, Jeffrey Farrey Sr. told investigators about his son’s admission that Jackson died by choking on something.

The Farrey family story began to unfold in mid-November when Jeffrey did not report to duty at Fort Bliss and had not done so since Nov. 13.

Army officials called police and searched the family home.

Police found a journal inside, believed to be written by Jenna, opened to a page that said, “DKH will be bringing our bodies to a place where we can be at rest.”

That’s what led investigators to believe the family was in imminent danger and alert the media late on Nov. 15.

A warrant stated investigators believed Jenna was corresponding with Facebook friend Susan Farbaky, who sent an instant message Nov. 16, 2013. They believed her Facebook account had info about their whereabouts.