Complex sentence: Kemper was driving eastward trying to leave California, but when word of his crimes hit the radio airwaves he became discouraged, stopped the car, called the police and confessed to murdering his mother.
Split into simpler sentences: Kemper was driving eastward trying to leave California, but when word of his crimes hit the radio airwaves he became discouraged. He stopped the car, then called the police and confessed to murdering his mother.