Here’s a shorter version, keeping the suspense and style:
No one was looking for a killer. That’s what makes what happened in Alto Hospicio, Chile, so chilling.
Between 1998 and 2001, 14 teenage girls and young women disappeared. Some were last seen walking between their homes and school, but the prevailing theory was that they had left on their own or were involved in prostitution.

As the searches lost momentum, Julio Segundo Pérez Silva, an unlicensed taxi driver, kept waiting on the highway between Alto Hospicio and Iquique, looking for teenage girls to give a free ride. Between 1998 and 2001, he sexually assaulted and murdered 14 young women, throwing several bodies into abandoned mine shafts.
Everything changed on October 3, 2001. Bárbara, 15, was attacked and sexually assaulted by Pérez Silva, beaten, and thrown into a 17-meter-deep pit. But she survived. After escaping and receiving help, she described her attacker as a taxi driver.

The following day, Carabineros arrested Pérez Silva. He eventually confessed to the murders and provided information to help locate his victims.
In 2004, he was sentenced to life imprisonment. The killer no one had been looking for was brought down thanks to the only victim who managed to survive.

