The 10 pieces of evidence investigators will use to solve JonBenét Ramsey's murder.

The fascination with the unsolved case of JonBenét Ramsey's murder continues to grip the world.

A new three-part JonBenét Ramsey Netflix documentary titled Cold Case: Who Killed JonBenét Ramsey? reexamines one of America's most notorious unsolved murders.

The series investigates the 1996 killing of six-year-old JonBenét Ramsey, who was found with a blow to the head and strangled in her family's Colorado basement.

The documentary highlights how the inexperienced Boulder police force and sensationalist media coverage compromised the investigation by fixating on the Ramsey family as suspects.

Watch the trailer for Cold Case: Who Killed JonBenét Ramsey? Post continues after video.

Through new interviews with JonBenét's father John and key investigators, the series presents evidence supporting the intruder theory, including unidentified DNA and a mysterious boot print. The documentary also features recordings from detective Lou Smit, who believed in the family's innocence.

That being said, it omitted a few pieces of evidence that didn't make the Ramsey family look so good.

So what exactly do we know for sure? We've rounded up the 10 most important pieces of evidence that investigators will use to solve this case.

The 911 call.

The 911 call made by Patsy Ramsey on December 26, 1996, raised several red flags.

Enhanced audio revealed three voices in the background, including one that sounded like Burke Ramsey, contradicting claims that he was asleep. Statement analysts found Patsy's word choices suspicious, particularly her shifting between "gone" and "missing" and repeated use of "just," which can indicate deception.

The operator noted that Patsy's frantic tone abruptly changed after she thought she'd hung up. In the 2016 docuseries The Case of: JonBenét Ramsey, the operator who took the call, Kim Archuletta, recalled feeling suspicious over what she heard.

"It sounded like she said, 'Okay, we've called the police, now what?' " the 911 operator said. "And that disturbed me. So I remained on the phone, trying to hear what was being said. It sounded like there were two voices in the room, maybe three different ones ... To me, it seemed rehearsed."

John and Patsy Ramsey. Image: Getty.

The ransom note.

The ransom note discovered in the JonBenét case on December 26, 1996, was an unusually lengthy two-and-a-half-page document.

Written on Patsy Ramsey's notepad with a pen from inside the home, the note contained peculiar phrases like "small foreign faction" and multiple spelling errors. FBI experts considered the note suspicious due to its excessive length.

"Listen carefully!" the two-page note began. "We are a group of individuals that represent a small foreign faction. We respect your business but not the country that it serves. At this time we have your daughter in our possession. She is safe and unharmed and if you want her to see 1997, you must follow our instructions to the letter."

Handwriting analysis of the note proved inconclusive for Patsy Ramsey, while John Ramsey was ruled out as its author. The alleged kidnappers demanded $118,000 which happened to be the same amount as John's Christmas bonus. The letter had been written on a notepad that belonged to the Ramseys.

A scene from Netflix's Cold Case: Who Killed JonBenét Ramsey? Image: Netflix.

The broken window.

A broken basement window played a significant role in the JonBenét Ramsey case. Investigators identified it as the most likely entry point for a potential intruder. Detective Lou Smit later demonstrated that someone could have easily accessed the house through this window by lifting the exterior grate.

A suitcase found beneath the window contained traces of broken glass and dirt, suggesting it may have been used as a step for the perpetrator's escape.

The suitcase.

This brings us to the suitcase: a Samsonite suitcase found in the Ramsey basement was another piece of evidence in the JonBenét murder case. The suitcase was positioned beneath a broken basement window, appearing to serve as a stepping stone, and bore what appeared to be a footprint.

Detective Lou Smit demonstrated that an intruder could have used the suitcase to enter and exit through the window, though a preserved spiderweb outside the window complicated this theory.

"The suitcase shouldn't have been there," John noted in Cold Case. "It was set there like it was a step because the window was fairly high ... you needed a ladder or a stepstool or something to get up through it."

The male DNA.

Male DNA found in JonBenét's underwear, under her fingernails, and on her long johns remains unmatched to any potential killer after nearly 30 years. While this DNA evidence led to the family's exoneration in 2008, its reliability is questioned due to a compromised crime scene.

In 2020, a former Boulder DA Stan Garnett told PEOPLE that because the crime scene was mishandled, the DNA evidence was not in a state "where you could really say anything definitively."

John Ramsey was exonerated in 2008. Image: Netflix.

The duct tape.

The duct tape found on JonBenét Ramsey's mouth has remained a crucial piece of evidence in the investigation. Experts believe it was part of a 'kidnap kit' brought by the perpetrator, suggesting a premeditated attempt at abduction that turned deadly.

The duct tape was compromised when John Ramsey removed it from his daughter's mouth. "I immediately pulled the tape off, and I tried to untie her hands, but the knot was tied really tight, I couldn't get it undone," John said in the Netflix docuseries.

Retired Boulder Police Detective Bob Whitson added that "there may have been some evidence on the duct tape if that wasn't removed."

Notably, fibres matching Patsy Ramsey's sweater were discovered on the duct tape.

The handmade garrot.

The garrote used in JonBenét's murder was a homemade device constructed from a nylon cord and a broken paintbrush handle taken from Patsy's art supplies. This makeshift weapon was used to strangle the six-year-old victim and was found tied around her neck when her body was discovered in the basement.

Despite its potential importance as evidence, John claimed to True Crime News that the garrote contains unidentified male DNA that has never been properly tested, which the police deny.

A recreation of the homemade garrote used in JonBenét Ramsey's murder. Image: Netflix.

The rope.

In the JonBenét murder, a white olefin cord was used to bind both her hands and neck. The cord was fashioned into a garrote using a paintbrush handle from Patsy's paint kit. The source of this cord was never located, but its melted end indicated it was a new rope.

A separate climbing rope was also discovered in a paper bag near JonBenét's room, though the Ramseys denied ownership of it.

"Nobody in the Ramsey family can identify it," Smit noted in an old recording played in Cold Case. "It is a possibility that the ... intruder could've taken that in with him also to use as binding and just left it up there."

The stun marks.

Detective Lou Smit identified small marks on JonBenét's face and back that were approximately 3.5 centimetres apart, matching the dimensions of a stun gun's prongs.

Dr. Michael Dobersen, a stun gun expert, supported this theory by conducting tests on pig skin that showed similar marks in size, shape, and color. However, forensic pathologist Dr. Werner Spitz disagreed, suggesting the marks were caused by pebbles or rocks on the floor.

During CBS's The Case of: JonBenét Ramsey investigation in 2016, experts proposed that the marks previously thought to be from a stun gun were actually caused by a toy train track.

The boot print.

A Hi-Tec boot print discovered in the concrete dust of the wine cellar near JonBenét's body became a significant piece of evidence in the case.

While initially considered potential evidence supporting the intruder theory, as no Ramsey family member owned such boots, later investigations linked the footprint to JonBenét's brother Burke. However, the family's attorney disputed this claim, stating Burke never owned Hi-Tec sneakers.

In Cold Case, Smit claimed there was "a faint impression of possibly a footprint" on the suitcase.

Read Next: Pineapple and the 911 call: 7 unexplained things Cold Case Who Killed JonBenét left out.

Feature image: Netflix.