Michael was 5'10", 140 pounds, with long black hair, dark skin, and dark eyes. He was 19 years old at the time of his death.
He was an expert at Tao-Tain-Do, a form of martial arts.
Michael failed to prevent Jak's wife Christina and daughter Jenny from being killed - instead he hid, unable to fight. The realization that he wasn't cut out for life in Deathlands, combined with the death of his girlfriend Dorothy and his overriding guilt over the deaths of Jak's wife and daughter, led him to hang himself in the barn on Jak's farm.
Michael was a premier martial artist, better at hand-to-hand combat than even Jak.
The text of his suicide note can be viewed here.