The attorney for a Chicago man who some think was wrongfully convicted of murder, says the search is still on for evidence of his client’s innocence. Alton Logan is serving life in prison for a 1982 shotgun killing.

His attorney, Harold Winston, says he looked through two boxes that belonged to another inmate. Winston had been told the boxes might contain an affidavit in which the inmate, Andrew Wilson, implicated himself in the murder. A search of Wilson’s boxes came up empty.

Winston says he hopes to find the affidavit in other of Wilson’s personal effects before a court hearing at the end of this week.. But, he says, “If not, we’ll put on a number of witnesses on Friday and I don’t know if the hearing will be finished or not but we hope we will convince the judge that Alton Logan is an innocent man and at least deserves a new trial.”

Andrew Wilson died last November. In recent months several attorneys have come forward to say they believe Wilson committed the crime for which Logan went to prison.