'The People v. O.J. Simpson' Creators Reveal What They Learned About Robert Kardashian

The creators said the late attorney had "the biggest heart."

Still, the two recently told Vulture they eventually found that the man who set in motion his family's entertainment empire was "the figure with the biggest heart in this show."

"What's interesting about Kardashian is he was someone I don't think Scott and I had any particular opinion about before we started researching," Karaszewski said. "We discovered he was a good man. He was the one guy in this case that didn't have any other weird motive involved. He was there because his best friend said he didn't do it, and he loved his friend, and he was going to remain loyal to his pal and see this to the end."

"Eventually, he gets very conflicted and he starts to wonder whether his friend actually did do it. For us he became a very rich, heartfelt character," he added.

"Yes, he did take his kids out to Chin Chin for Father's Day on the Sunday after the Bronco chase. That is all true," Alexander said. "We know that Robert Kardashian was not a man who sought the limelight. We do know that [Simpson's defense attorney Robert] Shapiro pushed him in front of the TV cameras to read the suicide note that day, which was not something he was comfortable with."

Karaszewski said fans of the Kardashian family shouldn't expect to see much of the reality TV family in the FX mini series. "The kids are only in five minutes out of the ten hours," he said.