Here's my guess as to why this 1955 "Trial-of-the-Century" drama (which highlighted the real-life Thaw-White murder case from 1906) failed to deliver a substantial enough wallop and, thus, hold onto this viewer's rapt attention.
It was because the real-life Evelyn Nesbit (who, at a much younger age, had played a pivotal part in this murder case) was now playing "technical adviser" on the set of this 1955 picture. And, as a result, nothing in the story could be filmed without her prior consent.
And because of this veto power that Nesbit (72 at the time) wielded, her youthful character in the story was white-washed, and made out to be the sweetest, most naive, little innocent bystander in the scheme of things.
And, on top of that, the sexual implications of Nesbit's torrid affair, at 17, with a man 3 times her age was down-played so unrealistically as to make it appear as if she and Stanford White were merely platonic friends.
As a result of all of this down-playing (at Nesbit's insistence) this film's story was virtually rendered flat and uninspired, with only shallow and apathetic performances given by all of its principal players.
I honestly believe that this 1955 picture could've been real dynamite story-telling had Evelyn Nesbit not had such a strangle-hold on its subject matter, as she adamantly insisted that her once ravishing "Gibson Girl" image remain intact, thus making certain that she was portrayed as the absolute epitome of "Turn of the Century" innocence.
Directed by Richard Fleischer (a fairly notable director), this disappointing melodrama suffered, as well, from a curious lack of essential close-ups.