Answer:
I am a rock group with four members. All dead one was assassinated.
Brown I am and much admired; many horses have I tried; tire a horse and worry a man; tell me this riddle if you can.
I am an instrument that you can hear but cannot see or touch. What am I?
What can you catch but not throw?
I am constantly overlooked by everyone but everyone has me. What am I?
I am your mother's brother's only brother in law. Who am I?