David T. Walker to Who Done It? in 7 Steps
- David T. Walker played guitar for Bongo Rock
- Bongo Rock was arranged by Don Coster
- Don Coster arranged Bongo Rock '73
- Bongo Rock '73 was mixed by John Lennon
- John Lennon wrote Blackbird
- Blackbird was produced by Harry Nilsson
- Harry Nilsson wrote Who Done It?