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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