This episode originally aired May 2, 2019. The victim was well liked and successful, which made the brutality of the crime even harder to understand. In the final moments of her life, she'd written a name on the wall - presumably that of the killer - in her own blood. But this wasn't an open and shut case and, in order to solve it, investigators would have to read between the lines.

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This episode originally aired April 29, 2019. An elderly woman is murdered. Though investigators were able to lift prints from the scene, they failed to find a match and the crime went unsolved. Years later, advances in fingerprint science enable police to identify the print and the killer.

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This episode originally aired April 25, 2019. A family vacation turns into a nightmare when the wife is found face-down in the lake. There are no witnesses and little conclusive evidence to help police determine if they're dealing with a suicide, an accident, or something more sinister... until a forensic pathologist uses a groundbreaking technique to discover the truth.

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This episode originally aired April 22, 2019. When a young dancer who got involved with the wrong crowd disappeared, her family immediately suspected her new friends. When a young dancer who got involved with the wrong crowd disappeared, her family immediately suspected her new friends.

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This episode originally aired April 18, 2019. A brutal murder, lots of suspects, and conflicting evidence... but the forensics were clear on one thing: The killer knew his victim. And that alone gave investigators a head start.

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This episode originally aired April 15, 2019. A serial bomber was on the loose in Illinois. Two churches had been bombed and one person was killed. Investigators had to stop the perpetrator before he struck again... and they hoped to find him by following a thin copper wire.

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This episode originally aired April 11, 2019. In a tragic twist of fate, just days after the woman sold her home and moved to a modest trailer, a fire took both the trailer and her life. But the autopsy proved this was no accident. It was arson and murder. Investigators had to determine who wanted the woman dead... and why.

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This episode originally aired April 8, 2019. A woman does not return home and, despite pleas from her family, police insist on treating it as a routine missing person's case.

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This episode originally aired April 4, 2019. An obstetrician returned home from the hospital and found his wife on the floor of the bathroom; she was covered with blood, not breathing. He tried unsuccessfully to revive her, staining his clothes with her blood in the process, and then he called 911. His version of events was not supported by the blood spatter evidence, and investigators had to determine why.

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