02/02/2016 02:55 EST | Updated 02/02/2016 03:59 EST

O.J. Simpson Was 'Barely Literate,' Suicide Note Edited, Says Author

O.J. Simpson's suicide note — and lawyer Robert Kardashian's public reading of it — was just one of the many sensational aspects of the famous saga.

But now, one author claims Kardashian edited the note, as Simpson himself was "barely literate."

"They created an O.J. Simpson who didn't really exist in real life," Jeffrey Toobin told Dr. Phil in an episode that aired Monday.

The original note was a "shocking document, in and of itself," he said.

Toobin's book on the Simpson trial inspired a new miniseries, "The People vs. O.J. Simpson: American Crime Story," which will debut on FX Tuesday.

Kardashian read the suicide note on June 17, 1994, the same day the NFL star failed to turn himself in and police famously chased him in a white Ford Bronco through southern L.A.

"They created an O.J. Simpson who didn't really exist in real life."

Lawrence Schiller, who wrote "American Tragedy: The Uncensored Story of the O.J. Simpson Defense," told ABC's 20/20 Simpson recorded a sort of suicide tape hours before the police chase.

"Oh boy, I don't know how I ended up here," he said in the recording Schiller obtained.

"Please remember me as 'The Juice.' Please remember me as a good guy."

Kardashian told Schiller in an interview he found Simpson in daughter Kim Kardashian's bedroom with photos of his family and a gun, threatening to kill himself. The lawyer had begged him not to do it where his daughter slept.

You can see more of Toobin's interview with Dr. Phil in the video above.

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