A YOUNG GIRL WITNESSES HER MOTHER IN DISTRESS AT A BLOODY CRIME SCENE IN THEIR HOME - IT WOULD BE UP TO A JURY TO DECIDE WHAT HAPPENED THAT NIGHT

Angelina Fernandes and Her Mother, Stephanie, Speak Publicly for the First Time About the Death of Andrew Wagner in "48 Hours: What Angelina Saw"

Angelina Fernandes will never forget the chaotic scene at her home on the night of May 7, 2014, when she was just 11 years old. She woke up and saw neighbors trying to save the life of Andrew Wagner, the fiancé of her mother, Stephanie. Wagner later died from a knife wound to his neck. Angelina's mother was charged with murder. Both women talk publicly for the first time with 48 HOURS correspondent Peter Van Sant and describe what they say was Stephanie Fernandes' complicated and volatile relationship with Wagner.

Angelina, now 20 years old, describes her mother's distress that night. "I just heard my mom from outside, 'help me, someone help me,' and then I just hear my mom screaming and crying," says Angelina.

Stephanie Fernandes says she had no choice but to defend herself the night Wagner died. "I never, never, and never would kill someone, harm someone in that way, on purpose," Fernandes tells Van Sant. "I will always love him."

In court, Andrew Wagner's mother, Melissa Wagner, fiercely defended her son. "[Fernandes] took away Andrew's joy and love of life ... She took away Andrew's dignity and self-respect. And when there was nothing, nothing, nothing left for her to take, she took away Andrew's life."

48 HOURS: "What Angelina Saw" will be broadcast Saturday, March 11 (10:00-11:00 PM, ET/PT) on the CBS Television Network and streaming on Paramount+.

48 HOURS: "What Angelina Saw" is produced by Chuck Stevenson. Hannah Vair is the field producer. Ryan Smith and Tamara Weitzman are the development producers. Annabelle Allen is the broadcast associate. Greg Kaplan, Michelle Harris and Grayce Arlotta Berner are the editors. Anthony Batson is the senior broadcast producer. Nancy Kramer is the executive story editor. Judy Tygard is the executive producer.

48 HOURS, now in its 35th year, is one of the most successful true-crime docuseries in television history and has been the #1 non-sports broadcast on Saturday nights for 16 consecutive years. 48 HOURS is broadcast Saturdays at 10:00 PM, ET/PT on CBS, and streams anytime on Paramount+. You can also watch 48 HOURS on the CBS News Streaming Network Wednesdays at 8:00 PM, ET. Download the CBS News app on your phone or connected TV. Follow 48 HOURS on Twitter, Facebook and Instagram. Listen to podcasts at CBS Audio.