In re: the 1989 tests ("three of five aspects of DNA from the murder scene matched those of body fluids taken from Hart, an American Indian. Only one in 7,700 American Indians would match the samples, as Hart reportedly did"), perspective is needed: the 1980 census listed the population of Oklahoma at 3,026,000 citizens. Those of Native American ancestry were vastly underreported by that census (three years after the murders). However, the Native population in Oklahoma would be about the same as today---about 7.8% of the population, or, roughly, 238,000 in 1977-80.
The estimate that "one in 7,700 would match the samples, as Hart reportedly did," would mean that over 30 other Native Americans in Oklahoma alone would have matched the same profile. The area around Locust Grove has a much higher concentration of Native Americans, perhaps the greatest in Oklahoma, given the vast Cherokee population---the 2000 census sets the Native population in Locust Grove itself at 32.50%. If at all accurate (which I doubt), the 1989 test estimate would, therefore, mean that perhaps 6-10 other Native Americans in the immediate area of Camp Scott would match the same profile.
That test, therefore, was, at best, not only "inconclusive" but highly inconclusive, and only served further to damn Hart twenty+ years after the fact. That must have been the only purpose for release of the information in the form it was released---as a vindication of LE for settling on Hart immediately and taking him to trial.
Gene Leroy Hart was railroaded from the start, and a jury of his peers found him not guilty of the Locust Grove murders. (It's also true that he may indeed not be innocent of participation in the crimes.) I find his premature death in 1979 in the Oklahoma State Prison at McAlester to be very suspicious; I doubt he would have been able to endure even for a short time his dexterous fitness regime if his heart had have been in the alleged condition it was "found" to be at autopsy.
(A word about the Locust Grove-area residents---and there seems to have been plenty of them---who aided Hart after his jailbreak: one must understand that what later became the state of Oklahoma was, first, the destination of the Cherokee tribes displaced from the Carolinas and Georgia and made to march westward on what would become known as The Trail of Tears. Those who reached Indian Territory here were told that this was their land under treaty in perpetuity. As the terms of very nearly all treaties were broken by the white man, so too here: most of the land given was subsequently taken away, and prejudice against Native Americans in Oklahoma became the norm. Hart's rape conviction may well have seemed to Cherokees in the area as yet another sad sham of white "justice." [Full disclosure: I am part Cherokee.] )
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