In May 2002, teacher Leslie Buck survived a violent kidnapping, escaped her attacker, and returned to her elementary-school classroom the very next morning. Less than 48 hours later, she lost her life inside her Connecticut home. What followed became one of the most haunting unresolved cases in the state’s modern criminal history. The man who kidnapped her, Russell Kirby, was arrested and eventually convicted. Leslie’s husband, Charles Buck, soo…