Complex sentence: The officer who arrested Genie's parents questioned them with his partner, and found that Genie's mother would not speak about her family--and particularly not her children--and Genie's father never seemed to acknowledge anything being said to him.
Split into simpler sentences: The officer who arrested Genie's parents questioned them with his partner, and found that Genie's mother would not speak about her family--and particularly not her children--and Genie's father refused to respond. He later said that Genie's father never seemed to acknowledge anything being said to him.