BURLINGTON, IOWA (AP) -- Prosecutors are now seeking a first-degree murder charge against a Burlington man accused of killing his ex-wife and setting her house on fire.

Dennis Richards is charged with second-degree murder and second-degree arson in the death of Cyd Richards last January.

Des Moines County prosecutors have asked a judge to allow them to amend the murder charge to first-degree murder.

Lead prosecutor Tyron Rogers says in court papers they have received additional reports since the original trial information was filed.

A response from Richards' defense team was not immediately filed.

A hearing on the issue is scheduled for Monday.

Richards' trial, which has been delayed twice, is set to begin on Dec. 1.

Information from: The Hawk Eye, http://www.thehawkeye.com

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