The autopsy for Paighton Houston has been completed, but authorities said they don’t yet know how the Trussville woman died.

Jefferson County Chief Deputy Coroner Bill Yates on Monday said further examination and testing is needed to determine the cause and manner of death.

Houston’s body was found Friday in a shallow grave in the backyard of a home on Chapel Drive in Hueytown. The remains were wrapped in sheets and the body was intact, said Jefferson County Bessemer Cutoff District Attorney Lynneice Washington.

Houston vanished Dec. 20. She was last seen at Tin Roof in the 2700 block of Seventh Avenue South in Birmingham’s Lakeview District.

The remains were recovered in the “muddy, nasty” back yard of the home, which is not currently occupied. Investigators arrived at the house at 9 a.m. Friday and the transport van left the scene with the remains shortly before 1 p.m. Friday.

Authorities on the scene included Birmingham police homicide officials, Trussville and Hueytown police, Jefferson County Sheriff’s Office deputies and K9, the Jefferson County’s Metro Area Crime Center. Hueytown’s Crime Scene Van arrived on the scene shortly after 9:30 a.m.

Neighbors say an elderly man once lived at the home, but family members took him out of the house a while back to care for him.

Jefferson County sheriff’s Deputy Chief David Agee said the sheriff’s office has taken over as the lead investigative agency on the discovery of the remains. He emphasized that this is a death investigation that has not yet been deemed a homicide. "Right now, we have a lot more questions than answers,'' Agee said, “but we hope to have those answers real soon. We’re gonna work hard and we’re going to find out what happened.”

According to Birmingham police, Houston left the bar about 10:45 p.m. with two heavy-set black males. Sgt. Johnny Williams said it was reported that Houston left the location willingly with the two men.

She had reportedly gone to the Birmingham bar with co-workers. One of her last text messages to the co-worker read, “Idk who im with so if i call please answer. I feel in trouble.”

Friends and family of Houston on Saturday put up yellow ribbons in Trussville in her memory. Visitation for Houston will be held Thursday, Jan. 9, from 5 p.m. until 7 p.m. at Clearbranch United Methodist Church in Trussville. Her funeral will be held Friday at 11 a.m., with burial to follow in Jefferson Memorial Gardens.