As Irving police continue their search for Megan Beth Johns' killer, friends and family members' suspicions are cast in various directions, including within. But investigators believe a bloody palm print holds the key.

Megan Beth Johns had a passion for helping others struggling in life but could it have led someone to fatally stab the 29-year-old woman inside her Irving apartment on Oct. 5, 1994?

Twelve years after the fatal shooting of Martin Munoz, an auto shop owner and married father of three (Ep. 4), a suspect goes on trial.

On the morning of March 12, 1984, Dana Bowman was working alone inside a south Fort Worth slipcover shop when a man stabbed her repeatedly with a screwdriver, then ran. The 29-year-old seamstress called for help, but died hours later at a hospital.

When her car stalled one April 1986 evening, Teresa Branch, 18, set off to jog the few blocks back to her parents' Arlington home for help. She never made it and was later found raped and murdered in a nearby church parking lot.

Dallas County juvenile probation officer Ray Hernandez was compassionate yet cautious. Yet, in 2008, police say someone he knew stabbed him 46 times, then set his Grand Prairie house on fire.

She let a late-night visitor into her Arlington apartment in January 2012. By morning, Irasema Chavez was found dead, stabbed more than 100 times.

The dark shadow of crack cocaine followed her every step, but was her addiction the reason Felecia Johnson disappeared 24 years ago?

More than 30 years later, family members are still haunted by the unsolved murder of Milton Hatchell, who was found beaten to death in a north Fort Worth neighborhood, a vicious attack that police said left his face "virtually unrecognizable."

Since Cheryl Springfield was murdered on Christmas Day 1980, one man remains as a suspect. But Barry Dean Kelly, who is serving a life sentence for the murder of another woman, insists he had nothing to do with Cheryl’s death.

With her young son and a niece sleeping nearby, Cheryl Springfield was killed on Dec. 25, 1980 and left near the Christmas tree in her home, the cord of an iron wrapped around her neck. Her case remains unsolved.

A Mexican national imprisoned three times for illegally entering the U.S. is accused in the 2007 fatal shooting of Martin Munoz, a beloved husband and father of three.

Martin Muñoz, an auto shop owner, worked hard so that his three children could have opportunities that he didn't. But a dispute over a tire rim left him dead and his family still heartbroken more than a decade later.

Margarett Terry had endured a life filled with heartache, burying two children and a husband. If life was fair, she would have died peacefully. Instead, she was murdered inside her home, a crime that remains unsolved — 28 years later.

More than four decades after 14-year-old Donald Rodger's death, a cold case detective seeks out new evidence to finally move the case forward.

Melvin Knox killed his friend Donald Rogers in 1973, and while a suspect in the case from day one, it wasn't until July of this year that Knox stood before a judge and publicly admitted his guilt. Reporter Deanna Boyd dives deep into one of Fort Worth's oldest cold cases.