How location sharing helped police catch a serial rapist-turned-killer

Friday, Nov. 12, 2021, started as a fun night in Los Angeles for architect Hilda Marcela Cabrales , 26, and her friend, 24-year-old model Christy Giles . The pair headed out to a nightclub in Hollywood and then to a warehouse party in East Los Angeles to see a DJ they both loved. Christy's husband, Jan Cilliers, was in San Francisco that weekend visiting his father. He says Christy and Hilda, who was new to Los Angeles, were becoming "fast friends." Christy Giles, left, and Hilda Marcela Cabrales photographed in the VIP section at the warehouse party where they went to see a favorite DJ. Jan Cilliers But what started as a happy girls' night out took a sinister turn, Cilliers says, when he woke up that Saturday morning in San Francisco to see his wife's phone location at a Los Angeles address he didn't recognize. He and Christy always shared locations, he says, for safety reasons. Cilliers says he texted Christy and didn't hear back. And, as the hours mounted without a word, Cilliers says, his fear began to grow. What happened that weekend and the tragic aftermath is investigated by "48 Hours" and contributor Jonathan Vigliotti in "Dead Girls Don't Talk ." An encore of the broadcast airs Saturday, June 20 at 10/9c on CBS and streaming on Paramount+ (folllowing the WNBA on CBS.) Cilliers says he experienced "raw panic" when, at around 5 p.m. on Saturday, Nov. 13, he says he saw Christy's phone had moved to a hospital about three miles from that strange address. …