Editor's note: This article will be updated to clarify speaker attributions from the press conference with corrections.

ADDIS, La. — Evidence in the death of seven-year-old Paris Williams was tampered with and concealed, and the overturned furniture initially reported was not the cause of her death, the Addis Police Department revealed at a press conference Tuesday.

Sgt. Rico Thomas, the department's public information officer, also disclosed a critical gap in the timeline that evening. A 911 hang-up call was received from the child's mother at approximately 7:30 p.m. on July 1 — more than two hours before a second 911 call reported an unresponsive child at 8020 LA Highway 1 South, Lot 19, in Addis.

Because the first call was made from a cell phone and the hang-up was so quick, officers were unable to pinpoint the location, Addis Police Chief Jason Langlois said. Officers responded to the area and made an attempt to call the mother back. She answered, said it was a mistake, that everything was okay, and hung up again.

Two hours later, at approximately 9:47 p.m., the second call came in. Officers found Paris suffering from critical injuries. She was transported to a local children's hospital, where she was later pronounced dead. The cause of death was determined to be multiple blunt force injuries, according to the WBR Chief of Forensic Investigations.

Detectives have determined that evidence at the scene may have been tampered with and concealed, resulting in additional criminal charges, Thomas said. Both Breyonne D. Dorsey, 30, and Christopher Butler, 33, have declined to provide statements or otherwise cooperate with the investigation.

Butler was not at the scene when officers arrived.

Dorsey, who Langlois previously confirmed is the child's mother, was arrested and booked on charges of second-degree murder, two counts of felony domestic abuse battery – child endangerment, principals, and obstruction of justice. Her bond was set at $1 million. Butler surrendered Monday on charges of second-degree murder and two counts of felony domestic abuse battery – child endangerment.

A 12-year-old male who was also in the household at the time is now with his father, according to Langlois.

When asked whether the no-contact order between Dorsey and Butler — issued as part of Dorsey's prior sentencing — was a factor in the charges, Langlois said he had no knowledge of the order.

Langlois said the department had never received a call to the residence prior to July 1.

"I would just have that feeling maybe if we had some kind of running track, if somebody would have said something or if calls would have been made in the past, maybe something could have been prevented," Langlois said. "It's hard to speculate that."

The Louisiana State Police crime unit assisted in processing the scene. Sgt. Carroll is the lead detective on the investigation.

Langlois confirmed that DCFS was not aware of the household prior to the child's death but is now involved in the investigation.

Additional charges are anticipated as investigators continue to gather evidence, Thomas said.

Anyone with information is urged to contact the Addis Police Department at (225) 687-2222 or after hours dispatch at (225) 490-8599.

Both suspects are presumed innocent unless and until proven guilty in a court of law.

This is a developing story. Check WBRIndependent.com for updates.