On May 31,1985, two days before her high school graduation, Shari Faye Smith was abducted from the driveway of her family home in South Carolina.

For several days after the abduction, the kidnapper called and sent letters to the family, taunting them with details of abduction and murder of Shari. Ultimately, he revealed the location of Shari’s body on a phone call to Shari’s older sister, Dawn.

But he wasn’t finished. Two weeks to the day of Shari’s abduction, the murderer snatched another victim, 9-year-old Debra May Helmick, who came to a similar fate. The authorities realized they were dealing with a sadistic, narcissistic serial killer of young women.

WHEN A KILLER CALLS is the haunting story of Murder,

Mark drew the short straw, and he joins me today on