DAVENPORT, IOWA -- Scott County authorities say a Burlington man in federal prison on child pornography charges faces a first-degree murder charge in the death of a woman whose badly burned body was found in January 2007 in a farm field near Davenport.

County Attorney Mike Walton says Wednesday that a warrant was issued for 33-year-old Chad Welsh charging him with killing

41-year-old Angela Hennes. He also faces a charge of abuse of a corpse.

Walton says Hennes was strangled to death. Authorities say DNA samples were taken, which later resulted in a match with Welsh's DNA.

Welsh is in federal prison in Springfield, Mo., serving an eight-year sentence. He was arrested on pornography charges in 2008.

Sheriff Dennis Conard says authorities are working to bring Welsh back to Iowa for trial.

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