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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This episode originally aired April 1, 2019. Police uncover a trail that reveals a husband's plot to kill his wife for insurance money.

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This episode originally aired March 28, 2019. The killer was meticulous, washing everything at the scene, including the victim's body. The only definitive evidence was a single foreign hair. Three years later he struck again and, this time, what he left behind would prove he committed both crimes.

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This episode originally aired March 25, 2019. A college co-ed was abducted from a parking lot. Her body was found later that day. She'd been sexually assaulted and shot at point blank range. Eight years passed and then a pair of shoes and a cell phone breathed new life into a cold case.

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This episode originally aired March 21, 2019. When a woman's husband was gunned down in his own garage by intruders, investigators worked tirelessly to find the assassins. But when they discovered that a wound sustained during the attack by the grieving widow may have been self-inflicted, they turned to science to help t hem unravel a twisted tale of lust, greed, and deception.

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