A Plattsmouth man who admitted in a 2003 outburst in court to killing his 4-year-old son has been granted a chance to challenge evidence that he says was planted.

On Thursday the Nebraska Supreme Court granted Ivan Henk a hearing on allegations that former Douglas County CSI director Dave Kofoed violated his civil rights as the crime lab investigated the death of Henk's son, Brendan Gonzalez.

Henk is serving a life sentence after pleading guilty in 2005.

In 2010, Kofoed was convicted of evidence tampering in an unrelated murder case.

Henk's lawyer subsequently filed an appeal with the Supreme Court.

Kofoed's attorney says his client never planted any evidence.