Has anyone in Alex Haley's family used DNA to show proof of their roots?

Question

That they are really of the Mandinka tribe.

Answer 1

Haley's book is a fraud.
Large parts were plagiarised from a novel named "The African". Haley settled with the (White) author out of court.
Haley's visit to the African village was announced well in advance and the authorites told the tribal elders they'd better 'discover' Haley's ancestor OR ELSE!

Answer 2

Roots, Haley's next bestseller, was a fictionalized version of his own search for his ancestral past, which led him to the African village of Juffure, in Gambia. Haley described Roots as "faction," a combination of fact and fiction. Although criticized by some for taking too many liberties in the telling of his journey into his ancestral past, Haley maintained that "Roots is intended to convey a symbolic history of a people."

At the time Roots was being written there is no way Haley could have been accurately DNA tested. Haley died in 1992 and the human genome project wasn't completed until 2000 and in all of the internet searches I've done I have found nothing about Haley having DNA testing done. So, my guess is no.