IOWA CITY, Iowa (AP) — Iowa’s fire marshal said Tuesday he is considering whether to review the arson conviction of a man serving a life prison sentence for a fire that killed his wife and child, a case a prominent defense expert says was based on debunked investigative techniques.

Ray Reynolds’ office has received a request for the review from an attorney for Stephen Keyes, who was convicted of two counts of first-degree murder and arson in a 1996 fire at his home in Springville, near Cedar Rapids.