Marshall has been playing and writing music for most of his adult life, and it serves him as a way to unwind and relax his mind. Here is a sampling of some of his original songs:
https://youtu.be/JJlalGrdzi4?t=50m7s
https://youtu.be/E598v8ysbeo?t=57m46s
https://youtu.be/57MCMbu2-j8?t=1h5m7s
https://youtu.be/r4nR0_RmVrE?t=39m19s
https://youtu.be/eegU9CaNRQg?t=1h11m6s
