In 2006, Sonia Rios was dubbed by local media as the "The Black Widow of Lomita," after her second husband, Navy officer Larry Risken, was fatally shot while visiting her family in the Philippines. Sonia's first husband, U.S. Marine Earl Bourdeau, was fatally shot in the head 19 years earlier. Then in 2007, Sonia Rios was also murdered under suspiciously similar circumstances. “48 Hours" correspondent Peter Van Sant reports. This classic "48 Hours" episode last aired on 8/1/2009. Watch all-new episodes of “48 Hours” on Saturdays, and stream on demand on Paramount+.

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On the day that Helen Hargan and her mother Pamela were found dead, Helen Hargan's boyfriend Carlos spent hours convincing 911 dispatchers to send help to the Hargan house. By the time police arrived, it was too late. Police were given two versions of the morning: one where Helen was scared for her life, and one where she was likely the killer. But Carlos' story, along with the weapon placement at the crime scene, would blow a hole in the theory that the Hargan killings were a murder-suicide.

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Correspondent Tracy Smith and Producer Gayane Keshishyan Mendez discuss the case of Susann Sills, a mother of twins who was found dead at the bottom of a staircase in the home she shared with her husband, a renowned fertility doctor. The team discusses the 911 call made by Dr. Sills, the police interview with a woman investigators believed he was courting, and the defense’s unusual theory that the family dogs were involved in Susann's death.

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The wife of a fertility doctor is found dead at the bottom of a staircase. Did her dogs play a role in her death or was the scene staged to cover a murder? Correspondent Tracy Smith reports.

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Holly Dunn tells her account of the August 29, 1997 attack on the railroad tracks by the University of Kentucky. Chris Maier was killed and Holly Dunn, who was stabbed, beaten and raped, miraculously survived her injuries. Fourteen months after Holly’s attack, Dr. Claudia Benton was murdered inside her Houston, TX area home, located near railroad tracks. Lexington Detective Craig Sorrell received a call from ViCAP, a national crime registry database, linking the crimes. Through fingerprint analysis, they identified a suspect. This classic "48 Hours" episode last aired on 8/3/2013. Watch all-new episodes of “48 Hours” on Saturdays, and stream on demand on Paramount+.

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Pamela Hagan lived in a quiet, wealthy Virginia suburb, surrounded by family: her daughters Megan, Helen, and her granddaughter lived with her in her million-dollar home. From the outside, the Hargan women had it all. But even though there was love, there were also grievances. When Pamela and Helen were found dead in an apparent murder-suicide, detectives had to ask: what was going on inside the Hargan household?

Get early, ad-free access to episodes of Blood is Thicker: The Hargan Family Killings by subscribing to 48 Hours Plus on Apple Podcasts or Wondery+ on the Wondery app. The series is widely available everywhere else you get your podcasts.

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Go behind the scenes with Correspondent Peter Van Sant and Producer Judy Rybak as they discuss the decades long manhunt for William Greer, a man charged with killing his girlfriend Tammy Myers. Hear about what it was like interviewing U.S. Marshals and their clever name for their pursuit: Operation Catch A Toe.

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When her mother disappears seven-year-old Nicki Bates begins a lifelong search to find her and bring her killer to justice. Peter Van Sant reports.

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