Tammy Erwin, an 18-year-old woman from Riverside, California, was tragically murdered on April 16, 1989. Her death was part of a series of brutal killings carried out by Andrew Urdiales, a former U.S. Marine who was later identified as a serial killer responsible for the deaths of multiple women across Southern California and Chicago. On the day of her murder, Erwin was picked up by Urdiales, who then drove her to a remote area near Palm Springs.
There, he sexually assaulted her before shooting her in the head and left hip, ultimately leaving her body in the desert. The discovery of cartridge cases near her body linked her murder to other killings in the region, leading investigators to realize they were dealing with a serial killer.
The investigation into Tammy Erwin's murder was part of a broader effort to solve a string of homicides that had occurred in Riverside, Orange, and San Diego counties between 1988 and 1995. Urdiales' killing spree began while he was stationed at Camp Pendleton, with his first known victim being Robbin Brandley, a college student who was stabbed to death in 1986. Over the years, Urdiales continued his violent acts, targeting women in isolated areas, often leaving behind crucial evidence such as cartridge cases that eventually helped law enforcement connect the dots between the murders.
Andrew Urdiales was finally apprehended in 1997 in Chicago, where he had continued his killing spree. He was initially convicted and sentenced to life in prison for the murders of three women in Illinois. However, further investigations and advancements in forensic technology allowed authorities to link him to the murders in California, including that of Tammy Erwin. In 2018, Urdiales was sentenced to death for the murders of five women in Southern California, bringing some measure of justice to the families of his victims. During his trial, Urdiales expressed remorse for his actions, but the severity of his crimes left a lasting impact on the communities affected by his brutal acts.
