The mystery surrounding the Zodiac Killer, a figure that has long puzzled investigators and the public alike, has taken a new turn. Sketches released by the San Francisco Police Department have been juxtaposed against a portrait of Marvin Merrill, unveiled by independent investigator Alex Baber. This development suggests a potential connection to the infamous Black Dahlia case, following the cracking of a long-standing code.

Meanwhile, the chilling story of the Gilgo Beach killer, Rex Heuermann, continues to unfold. His ex-wife has revealed that she now resides in the basement where he allegedly murdered seven victims, adding a haunting layer to an already grim narrative.

In another high-profile case, the ongoing search for Nancy Guthrie, mother of “Today” co-host Savannah Guthrie, remains a pressing concern. The family is calling for renewed attention as the investigation continues without resolution. Experts suggest that while DNA testing could take months, there is a possibility for it to be expedited.

Finally, the Idaho murders involving Bryan Kohberger are under renewed scrutiny. A new book on Kohberger is shedding light on previously unseen evidence, raising questions about the admissibility of a key piece of the puzzle: a sheath found at the crime scene.

Nancy Guthrie, the mother of “Today” co-host Savannah Guthrie, remains missing and the family is urging renewed attention as the search drags on.  (Courtesy of NBC)

IDAHO MURDERS: New book on Kohberger reveals previously unseen evidence, claims sheath could be inadmissible

COUNSEL CALLED: Husband of American woman who vanished in the Bahamas hires U.S. lawyer after returning from island

YEARS OF DOUBT: Party prep tale falls apart as husband charged in wife’s decades-old cold case murder

GENETIC TRAIL: Forensic genealogy unmasks cold case suspect as strangler, sexual predator decades later, officials say

Donna Bell (left) and Cherie Lynn Bishop (right). Bell was raped in 1993 by Robert Carey of Brockton, while Bishop was killed by Carey in 1991. (Plymouth County District Attorney)

PLAIN SIGHT: Decades-old cold case breakthrough leads to arrest in execution-style killings of married couple before child

DEADLY BETRAYAL: Marine veteran allegedly gunned down by husband in attack outside home, police say

BURIED TRUTH: Killer admits to decades-old cold case slaying after investigators lean on new forensic evidence: officials

DECK OF INJUSTICE: Prosecutors warn Anna Kepner’s stepbrother shouldn’t roam free after alleged cruise ship murder

The 16-year-old stepbrother, identified as T.H. in court documents, is accused of sexually assaulting 18-year-old Anna Kepner and intentionally killing her on Carnival Cruise Line’s Horizon ship. (Shauntel Kepner/Facebook)

GROWING LIST: NASA nuclear engineer found dead in burned Tesla after vanishing from his Alabama home last year

‘WAITED FOR ANSWERS’: Wife cuffed in husband’s decades-long murder mystery as cops cite new tech break

DARK CONNECTION: Man whose wife vanished years ago now cuffed in separate cold case – authorities say his past was deadly

PATCHED PAST: Killer undone by decades-old threads — glove, towel and tee stitch together cold case justice

STUCK TO THE TRUTH: DNA from chewing gum nails longtime sexual predator decades after reign of terror: report

FINAL ANSWERS: Cold case breakthrough solves teen killing after suspect lived free for decades: ‘Better be afraid’