JonBenet Ramsey Investigators Reunite, New Witnesses Emerge in Documentary About Her Murder

Investigators of one of the most notorious unsolved murders in U.S. history have been reunited in a six-hour investigative series set to air next month.

Investigators from one of the most notorious unsolved murders in America's recent history have reunited in a six-hour investigative series set to air next month.

Before Serial introduced the world to Adnan Syed and Making a Murderer made Steven Avery a household name, there was the shocking case of Colorado child beauty queen JonBenét Ramsey.

Read: JonBenét Ramsey's Brother Breaks His Silence Nearly 20 Years After His Sister's Murder

The Case Of: JonBenét Ramsey, set to air next month on CBS, attempts to piece together what led to the 6-year-old's grisly death on the day after Christmas Day 20 years ago — and who was responsible.

New investigators are being paired with the officials who spoke to the players and saw the scene of the crime all those years ago in an effort to close the case.

The original investigators include former New York City prosecutor, retired FBI supervisory special agent and profiler Jim Clemente; world-renowned forensic scientist Dr. Henry Lee; former chief investigator for the Boulder district attorney, James Kolar; leading forensic pathologist Dr. Werner Spitz; and retired FBI supervisory special agent and forensic linguistic profiler James Fitzgerald.

New experts reviewing the case include former New Scotland Yard criminal behavioral analyst Laura Richards and retired FBI supervisory special agent and statement analyst Stan Burke.

Read: Nearly 20 Years After JonBenét Ramsey's Murder, Where is Her Family Today?

"We hope to get the truth out about how she died," Clemente says in the riveting trailer for the series. "She's not gotten justice yet."

The scope of the highly skilled team’s investigation includes re-examining crucial evidence using advanced technology and forensics, meticulously recreating the crime scene by rebuilding full-scale replicas of key rooms from the Ramsey house, conducting extensive interviews and introducing new theories.

"We want to get the truth out so JonBenét can rest in peace," Clemente said.

The series will air in three parts starting September 18 on CBS.

Watch: Police in Desperate Search for 5-Year-Old Girl After Mother Is Found Dead in Apartment