David E. Kelley has always been fascinated by the law.

His best-known works, from “L.A. Law” to “The Practice” to “Boston Legal” to “Ally McBeal,” are all set in the legal world; the genre has become his bread and butter. “I don’t always want to [stay within that space] — I like to be somewhat diverse with my offerings — but I do have a fascination and maybe proclivity still for law,” Kelley said. He studied it at Boston University, graduating with a degree in 1983, and was a practicing attorney for a brief period before Hollywood called. “I always felt that the law was our best means, flawed as it is, of legislating human morality and ethics. Most of my shows, when we do them at their best, we’re mining the core ethics of the characters.”

Enter “Presumed Innocent,” the eight-part minise

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