Five years ago, Cameron Todd Willingham was executed for setting the fire that killed his three young daughters. Now, a fire expert hired by the state that sentenced him to death has concluded that Willingham was incapable of committing arson.

In a report to the Texas Forensic Science Commission released last week, the International Association of Fire Saftety Science ruled out the possibility of arson as the cause of the fire that killed 2-year-old Amber and 1-year-old twins Karmon and Kameron on Dec. 23, 1991, in their Corsicana home. A number of other experts have concluded that no arson took place; some of this evidence had come up in the months before Willingham was executed.

The Texas Forensic Science Commission requested the analysis by the London-based organization after Innocence Project submitted claims of questionable evidence in 2006. The report, filed by the London-based organization, placed the blame for Willingham's wrongful conviction on a faulty investigation by Texas officials, namely State Fire Marshall's Office.

IAFSS Chairman Craig Beyler says the opinions of Deputy State Fire Marshall Manuel Vasquez were "nothing more than a collection of personal beliefs that have nothing to do with science-based fire investigation."

The report says the Vasquez and other investigators refused to take into account the witness statements that contradicted the charge and never investigated alternative causes of the fire. 

The New Yorker has released an indepth article of the case and the report. Click here to read the article.