Two doses, one failed execution: How did Christa Pike survive?

For more than three decades, May Martinez lived with the same date burned into her memory: January 1995, when her 19-year-old daughter, Colleen Slemmer, was tortured and murdered.On September 30 this year, Martinez travelled 11 hours from Florida to Tennessee with her husband to witness what she believed would finally be the closing chapter. Christa Pike, the woman convicted of killing her daughter, was scheduled to die by lethal injection at Riverbend Maximum Security Institution.Pike was 18 when she killed Slemmer. Now 50, she was about to become the first woman executed by Tennessee in more than 200 years.Martinez and her husband arrived at about 8:30 in the morning and waited nearly 12 hours inside the prison before the death chamber finally opened.Inside the chamber, Pike was strapped to a gurney. An IV had been placed in her arm.