20/20 - Season 45 (1978)

When a mom is found dead in her luxury apartment, it isn't immediately clear whether it was a slip and fall or something more sinister happened;

This installment details the true-crime story of Nicole "Nikki" Addimando's shooting and killing of her domestic partner, Christopher "Chris" Grover on September 28, 2017 in Poughkeepsie, New York.

The 1998 death of Julie Jensen of Pleasant Prairie, Wisconsin, is investigated; the case included a letter, written by Jensen, that said suspicion should fall on her husband Mark, if anything happened to her;

Norfolk, Virginia: This installment outlines David Wayne Hoshaw Jr.'s 2007 double-murder of a mother, Vonda Goyena, age 74, and her daughter, Angelique Goyena, age 35. Three years after the murders, David Hoshaw pleaded guilty.

Instagram model Kelsey Turner's relationship with a 71-year-old psychiatrist, Dr. Thomas Burchard, turns deadly in 2019. She is convicted and sentenced to 10 to 25 years in prison.

News and analysis of the Murdaugh family murders of Paul and Maggie and the 2023 trial of Alex Murdaugh.

1998 Arlington, VA: James Christopher Johnson finds his fiancee Andrea Cincotta dead. Police force a confession from him after 28 hours of interrogation. 20 years later, he is indicted and found innocent. Bobby Joe Leonard pleads guilty.

A love triangle, a murder and arson -- an exclusive prison interview by ABC News Correspondent John Quiñones with Nikki Entzel, the woman at the center of the crimes who still claims she is innocent in spite of the overwhelming evidence.

A college student is murdered after being stalked; questions are raised regarding whether the university failed to protect her;

This installment details the 2014 murder of Robert Limon by his wife Sabrina Limon and her lover Jonathan Hearn.

St, Paul, Minnesota, April 25, 2010: This installment details the murder of Heidi Firkus by her husband Nicholas "Nick" Firkus.

Investigating the mystery of a body that was found in a barrel at Nevada's Lake Mead;

The mysterious case of the killer clown, who murdered a Florida mother;

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