This is what Jim O'Neal posted a few days ago on the Southern Soul newsgroup:
"Thomas "Tutty" Gadson, who fronted the Kansas City band The Derbys (Derby's), aka Tommy & the Derbys, died Oct. 26. He was struck by a car after leaving a club in Los Angeles. He and the Derbys recorded for Central, Moneytown, KC and Kool. I interviewed him once a number of years ago when I did not know about the "other" Tommy & the Derbys (the Tommy Tate group from Jackson)."
And:
"Tommy was James Gadson's brother. They were both in the Derbys, and before that, the Carpets. Marva [Whitney] sang with the Derbys before she was with James Brown."