October 7, 1980 - Feb 9 Killer
The crimes attributed to him span two years and two victims, one of them an unborn child — a detail that shaped how investigators and the public came to understand the case. The designation "February 9 Killer" reflects the investigative framework built around his pattern, connecting murders that might otherwise have remained isolated.
From Wikipedia
Juan Antonio Arreola-Murillo (born October 7, 1980), also known as the February 9 Killer, is a murderer responsible for the killing of two Salt Lake County, Utah women across the span of two years. In 2006, Arreola-Murillo murdered Sonia Mejia and her unborn baby. Two years later, he murdered Damiana Castillo. Both murders were committed on the same day, February 9, hence the nickname.
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