The arrest affidavit for 51 year old Tina Fay Sinclair has been released by 97th District Judge Jack McGaughey.
And it sheds light on what Sinclair says happened to her mother.
It all started on June 3rd when a Montague County investigator went to the Lone Star Road home of 68 year old Bonnie Gresham, who had not been seen or heard from in about a year.
The investigator found Gesham's daughter there and interviewed her.
They say Sinclair first told them her mother was in West Virginia and even gave investigators her mom's cell number, which actually belonged to someone else.
Then, investigators questioned two women who had more information on the case.
According to the affidavit, one woman who lived in the trailer with Sinclair, says she saw a bed sheet in the garage that had a stain on it that appeared to be blood; she knew Sinclair had burned some clothes behind the trailer a few days earlier; and that another woman had more information about those clothes.
The affidavit says investigators spoke with that woman who says she helped Sinclair burn bags of clothes after Sinclair learned rumors were circulating that she had killed her mother.
And she also told investigators she heard Sinclair identify herself as Bonnie Gresham on the phone; that Sinclair received about $100,000 in an insurance settlement after a fire destroyed her mom's house; and that Sinclair had been paying bills using her mother's name.
Investigators obtained a search warrant and returned to the trailer home where they say they found drugs, drug paraphernalia and checks belonging to Gresham in Sinclair's room.
This past Friday, investigators returned to the property with another warrant to search for human remains, blood and identifying documents belonging to Gresham.
And it was during that search investigators say Sinclair told them this.
According to the affidavit, Sinclair says after arguing and pushing her mother to the floor of her trailer, she suffocated her by stuffing paper in her mouth.
She then wrapped the body in a bed sheet, rolled it into a large plastic container and put it in a lawnmower trailer while she went to buy cement.
When she returned she put Gresham's body in a three foot deep hole, added cement, filled the grave then concealed it with limbs and boards.
Investigators exhumed the grave and had an autopsy performed which revealed Gresham's death as a homicide.
Tonight, Tina Fay Sinclair remains in the Montague County Jail on a first degree murder charge.
Her bond is $500,000.
As for the two women who knew about the crime, Montague Sheriff Paul Cunningham says at this time no accessory charges are being filed against them.
So, what's the motive behind the murder of Bonnie Gresham?
The affidavit does not make it clear whether Gresham was killed for her social security checks, or if she was killed in the argument and Sinclair then decided to begin using her social security money after the death.
But the investigation continues.