Updated

Formal steps by a state's attorney in Illinois to permanently dismiss the case against a man he believes was wrongly convicted in a 1957 killing have not deterred the victim's brother from seeking the appointment of a special prosecutor.

The (DeKalb) Daily Chronicle reports (http://bit.ly/1VBT8HW ) that Charles Ridulph has hired an attorney to help him pursue a special prosecutor to defend the conviction.

Jack McCullough was sentenced to life in prison in 2012 in the killing of Maria Ridulph in Sycamore. But a new state's attorney, Richard Schmack, says his review of the investigation found flaws and determined McCullough's alibi was solid.

A judge vacated the conviction and McCullough was released Friday.

Schmack filed a motion Tuesday asking the judge to dismiss the case with prejudice, meaning it couldn't be refiled.

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Information from: The Daily Chronicle, http://www.daily-chronicle.com