Regarding Janet Malcolm and the possibility of MacDonald's innocence, I found this somewhat telling. In his July 1998 Vanity Fair article, "The Devil and Jeffrey MacDonald," Robert Sam Anson writes that
Compiling the 479-page Fatal Justice was a 15-year struggle, one that had recently seen the death of Prince Beasley—"the star detective," Bost calls him. But with a new partner, a California artist named Jerry Potter, Bost had done it. A point-by-point rebuttal of the prosecution's case, mixed with conspiracy theories involving the army, the Justice Department, and the F.B.I., the book glided over the most ominous evidence, and said next to nothing about the peculiarities of MacDonald's witnesses and investigators. But reviewers were ecstatic. "A quietly convincing book," said Janet Malcolm, who was now corresponding regularly with MacDonald and admitting she'd become one of his "groupies."