Who is Clark from Genie: A Scientific Tragedy and what is their importance?

Clark was Genie's father. Clark did not like noise and did not want children. When Irene gave birth to a baby girl, Clark locked her in the garage where she died of exposure. Irene went on to give birth to a son and two daughters, one of the daughters dying of Rh blood poisoning. When his mother was killed by a hit and run driver, Clark became so overwhelmed with grief and and the idea that the world was an unfriendly place that he became a hermit in his mother's house. Clark took his family along with him, restricting their time outside of the house.