Brian Dugan, right, pleaded guilty to killing 10-year-old Jeanine Nicarico in Naperville, Ill., in February 1983.
"I don't deserve much, probably not anything at all, but I think everyone is entitled to the truth, no matter where it leads."
Those are the words reportedly typed by Brian Dugan in a letter addressed to unspecified media explaining why he admitted to the 1983 killing of 10-year-old Jeanine Nicarico.
The letter, obtained by the Daily Herald, says the letter cites a 1985 confession in which Dugan detailed facts about the Naperville girl's abduction, rape and murder.
Dugan says he wrote the confession to clear wrongly convicted Rolando Cruz and Alejandro Hernandez, who endured multiple trials, death sentences and years in prison before exoneration.
Dugan was indicted for the crime in 2005.
The 52-year-old Dugan is serving two life prison terms for two other murders and a series of unrelated sex attacks.
On July 28, Dugan submitted a guilty plea with the hope a jury will spare his life because he accepted responsibility. Jury selection was to begin Sept. 18.
Copyright Associated Press / NBC Chicago