His family moved frequently during Clark's childhood due to his father's job, and he later claimed to have lived in 37 countries including India, Switzerland, and the Marshall Islands.

Subsequently, Clark became a boiler operator at the Jergens soap factory in Burbank but was fired due to a high rate of absences and violent threats he had made against his coworkers.

He persuaded Bundy to purchase two pistols for him to use, reportedly seeking to fulfill his fantasy of killing a woman during sex and feeling her vaginal contractions as she died.

Throughout Clark's case, which began in 1982, he intentionally caused delays by complicating and drawing out the process through misuse of the court to his advantage.

He acquired knowledge through his access to the law library and used it to formulate demands, appeals, and contentions that had to be addressed before the case could be concluded.

[19] Clark was portrayed by Thomas Ian Griffith (under the modified name Doug Brister) in the television movie A Vision of Murder: The Story of Donielle.

[20] The film stars Melissa Gilbert as Donielle Patton, the real-life woman with psychic capabilities who helped the police capture Clark.

[22][20] The film also co-stars Maria Conchita Alonso, Kim Hawthorne, and Rip Torn, and was shot in Vancouver, British Columbia during November and December 1999,[23][24] before premiering on CBS in February 2000.