Complex sentence: Rami Adwan, the son of Kamal Adwan, who was in his father's Beirut apartment when he was killed, and said that his father was not at all involved in Munich, but did organize resistance against the Israeli military occupation of the West Bank.
Split into simpler sentences: Rami Adwan, the son of Kamal Adwan, who was in his father's Beirut apartment when he was killed, said that his father was not at all involved in Munich. However, he admitted to organizing resistance against the Israeli military occupation of the West Bank.