The Associated Press

AUSTIN, Texas (AP) - A state-funded report says that an arson investigation that led Texas to execute a man was poorly conducted and couldn't be supported by fire science or investigative standards.

Cameron Todd Willingham was executed in 2004 for setting fire to his Corsicana house, killing his 2-year-old daughter and 1-year-old twins.

The report released Tuesday from an independent expert hired by the state mirrors the 2006 findings of fire investigation experts hired by the Innocence Project.

Fire scientist Craig Beyler wrote in the new report requested by the Texas Forensic Science Commission that "the investigators had poor understandings of fire science."

Forensic Science Commission chairman Sam Bassett says the final report is likely to be issued in the first half of 2010.