David Smith, 52, was found guilty of three counts of aggravated indecent liberties with a child and not guilty on three counts of rape that occurred between September 2010 and July.
KNZA reports the verdict was read after only two hours of deliberation by the jury.
Smith originally faced 15 indecent liberties counts and 15 rape counts before testimony by the victim and evidence presented Tuesday afternoon caused the judge to amend the charges.
Since one of the guilty counts happened while the victim was under 14, under Jessica's law, Smith will face a mandatory life sentence.
He will face standard sentencing guidelines on the other two charges.
KNZA reports Smith's expression changed little during the reading of the verdict, while one member of the victim's family eyes closed her eyes and bowed her head with an expression of relief.
Smith was arrested on July 26th of last year by the Atchison County Sheriff's Department and has remained in jail since.
Sentencing is scheduled for March 19th.