Complex sentence: Despite Ripley's coaching and reassurances, Frank is overwhelmed by guilt as well as by his unrequited love for a teenaged girl named Teresa, and eventually commits suicide by throwing himself over the same precipice from which he pushed his wheelchair-confined father.
Split into simpler sentences: Despite Ripley's coaching and reassurances Frank is overwhelmed by guilt as well as by his unrequited love for a teenaged girl named Teresa. Young Pierson eventually commits suicide by throwing himself over the same precipice from which he pushed his wheelchair-confined father.