DENVER -- An autopsy report released Thursday into the death of a 3-year-old Denver girl gives no definitive cause of death, but it does reveal signs of abuse.

The body of Neveah Gallegos was found in a white plastic trash bag that had been dumped in a wooded area near a ravine, about 3 miles from her home.

Denver officers spent days looking through trash bins after Neveah's mother confessed to police that the girl was dead and had been dumped somewhere in the city.

According the Denver Medical Examiner, Neveah had signs of "recent blunt force trauma to the abdomen with apparent hemorrhage ... consistent with nonaccidental (abusive) trauma."

The coroner also noted that the toddler had several bruises of varying age on her face, arms, chest, thighs and lower legs.

"Death is due to undetermined causes. There is evidence of trauma of varying ages ... An asphyxial mechanism in the death (suffocation or strangulation) has not been ruled out. Additional information through continuing investigation may yield a more definitive cause of death," the coroner wrote.

So far no one has been charged. Prosecutors have been waiting for the autopsy report before deciding on how to proceed.

Former Denver prosecutor and legal analyst Craig Silverman told 7NEWS the autopsy does not give prosecutors the answers they were looking for.

"Normally when you are pursuing a murder charge, you want the autopsy report to rule the cause of death as homicide. This ruling does not go that far." he said. Silverman said prosecutors may wait a while in hopes that one of the suspects will be more cooperative with police.

Neveah's mother, Miriam Gallegos, and her mother's boyfriend, Angel Ray Montoya, were arrested after she disappeared.

Gallegos initially told police that her daughter was snatched from her arms by two strange men, but when questioned at her home, Gallegos admitted that Neveah was dead. She said that her boyfriend had called her at work that afternoon and told her to come home immediately.

When Gallegos arrived home she saw that her girl wasn't breathing, and in a panic, she and Montoya decided to dispose of the body, Gallegos said.

They stuffed her body into two trash bags and Montoya carried Neveah's body in a duffel bag to dump it somewhere in the Denver metro area, Gallegos said.

Miriam Gallegos was arrested on suspicion of false reporting, fatal child abuse and being an accessory to murder. Montoya, 22, had been arrested on suspicion of first-degree murder.

The couple was released Oct. 1 without charges because prosecutors were waiting for the autopsy report before filing formal charges.

Montoya was re-arrested in late October for failing to notify the Denver police sex offender registration unit that he had changed his residence, which is required under his terms and conditions as a registered sex offender. He remains behind bars.