An Innocence Project attorney is questioning the impartiality of the prosecutor leading a Texas science panel's probe of an arson investigation that led to the execution of a Texas man.

Stephen Saloom of the Innocence Project said Friday at a panel meeting in Austin that prosecutor John Bradley shows "a lack of objectivity" in the Cameron Todd Willingham case.

Bradley has publicly called Willingham a "guilty monster."

Bradley is the chairman of the Texas Forensic Science Commission, which is investigating whether investigators committed professional misconduct in determining arson caused a 1991 fire that killed Willingham's three daughters. Willingham was executed in 2004.