Complex sentence: When Ochs heard about the manner in which his friend had been killed, he was outraged and decided to organize a benefit concert to bring to public attention the situation in Chile, and raise funds for the people of Chile.
Split into simpler sentences: When Ochs heard about the manner in which his friend had been killed, he was outraged. He decided to organize a benefit concert to bring to public attention the situation in Chile and raise funds for the people of Chile.