A former West Tennessee corrections officer who is facing the death penalty if convicted on charges of fatally shooting two U.S. postal workers during a robbery plans to change his plea from not guilty.

The calendar for U.S. Senior District Judge Jon P. McCalla shows a change of plea hearing scheduled for Thursday afternoon for Chastain Montgomery.

Montgomery has pleaded not guilty to shooting Paula Robinson and Judy Spray during a robbery of Henning's post office in October 2010. Henning is about 45 miles northeast of Memphis.

Prosecutors say Montgomery and his 18-year-old son became angry and began shooting after they realized the post office had just $63 to steal.

Chastain Montgomery Jr. was killed in a shootout with police in Mason in February 2011.