In 1975, Bundy shifted much of his criminal activity eastward, from his base in Utah to Colorado. On January 12, a 23-year-old registered nurse named Caryn Eileen Campbell disappeared while walking down a well-lit hallway between the elevator and her room at the Wildwood Inn (now the Wildwood Lodge) in Snowmass Village, 400 miles (640 km) southeast of Salt Lake City. Her nude body was found a month later next to a dirt road just outside the resort. She had been killed by blows to her head from a blunt instrument that left distinctive linear grooved depressions on her skull; her body also bore deep cuts from a sharp weapon.
Yang was born in Schenectady, New York, on January 13, 1975. His parents were from Taiwan and immigrated to the U.S. in the 1960s. They met while they were both in graduate school at the University of California, Berkeley. His father graduated with a Ph.D. in physics and worked in the research labs of IBM and General Electric, generating over 69 patents in his career. His mother graduated with a master's degree in statistics and became a systems administrator at a local university. Yang has an older brother, Lawrence, who is a psychology professor.