Complex sentence: J. D. Tippit (September 18,1924--November 22,1963) was an American police officer with the Dallas Police Department who was, according to five federal government investigations, shot and killed by 24-year-old former Marine Lee Harvey Oswald.
Split into simpler sentences: J. D. Tippit (September 18,1924--November 22,1963) was an American police officer with the Dallas Police Department. Tippit's killer was, according to five federal government investigations, former Marine Lee Harvey Oswald.