When police arrived at the Minneapolis apartment building on June 13, 1993, they investigated the murder of 35-year-old Jeanie Childs, which was a tragic scene. Her body was found partly underneath, her bedroom was in chaos, with blood splashing on the walls and floors. The child was stabbed more than 60 times. When investigators tried to piece together the unfolded content, they found a rare clue in their bedroom: bloody bare footprints.

"It caught my attention immediately...I mean, wow," retired forensic scientist Bart Epstein told 48 Hours correspondent Erin Moriarty in "Footprints" aired on CBS on May 17, and played on Paramount+. "You can't see this at the crime scene and you're gradually lingering barefoot," Epstein said.

Investigators know that the footprint must belong to Childs' killer because she was wearing socks when she died. These footprints must remain there after the perpetrator stepped on wet blood after the murders. Investigators recorded and captured the footprints.

"So, in addition to the tendency to show the inner guise, the footprint is also important to show that it is clear who may be suspicious," said retired FBI agent Chris Boeckers.

According to the case files, investigators compared the footprints left by the crime scene with multiple people, including a man named Arthur Gray, who was living with him during the murder. According to police reports, authorities found the hair was placed on Childes' left hand, with one of the hairs matching gray.

But Box said the case against Gray quickly began to collapse. “He had a very solid alibi, and he wasn’t in town that weekend and was confirmed by someone else,” Gray, who likes to ride a motorcycle, told authorities that he was in Milwaukee. The forensic scientists also examined Gray's footprints and determined that he did not leave those footprints at the crime scene.

A few days became years, and then decades did not find the person who left these footprints. In 2015, forensic scientist Andrea Feia was asked to test DNA on items collected at the crime scene and determine that there was an unknown DNA profile that was repeated continuously. It was found on a bedspread, towel, towel, a T-shirt and bathroom sink.

The researchers then turned to the investigative genetic lineage for answers. A forensic genealogist submits an unknown DNA profile to the genealogy website. "Forensic genealogists say she has a game with two Minnesota brothers," Box said, one of whom is businessman and hockey dad Jerry Westrom.

Investigators are eager to confirm that the unknown crime scene DNA is indeed Westrom, but to do so, they need to track him down. In January 2019, investigators followed Westrom in Wisconsin’s daughter’s college hockey game and obtained napkins and food containers he used after eating in the arena. They took the project to the lab for testing and it turned out that there was a game.

In the second month, February 2019, Westrom was arrested for murdering a child. In a police interview, Westrom denied being in the apartment and knowing children. The next day, authorities collected his footprints for comparison.

Although Westrom's DNA was on site, it was important to confirm that the footprint belonged to him, as other male DNA was found in Childs' apartments that did not belong to Westrom.

Mark Ulrick, director of Minneapolis Police Forensic, checked his footprints. "In Minnesota, people don't commit multiple crimes," he told "48 hours." He said he focused on rubbing the skin of the ridges - the arrangement of ridges and furrows - unique to everyone. "The frictional ridge skin was found on... fingers, palms and soles of the feet," Ulric explained. During the exam, he compared the unknown footprints with Westrom's prints and other suspects' prints.

Westrom’s defense team hired its own forensic scientist Alicia McCarthy to verify Ulric’s work. What will the expert’s conclusion on the footprint be? Watch Saturday, May 17 at 10/9C on CBS and stream on Paramount+.