Wayne Coldiron, one of the suspects in the deaths of Byrd and Melanie Billings, served two years in a Tennessee prison after a fight ended in a man's death.
In 1992, an argument between Coldiron and an acquaintance, Terry Corbett, erupted at a home in rural Hamblen County, according to a Tennessee court document.
When the two men finished fighting, Coldiron called 911, saying he defended himself against Corbett's attack, the document said.
Corbett declined immediate medical attention and was taken to his mother's home by officers. He died the next day after being taken to a hospital.
Coldiron eventually pleaded guilty to a charge of criminal negligent homicide and was sentenced to two years in prison.
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He was arrested in 1998 in Broward County, Fla., on an aggravated assault charge. He served 21 months in state prison and was released from the Wakulla Correctional Institution near Crawfordville in February 2000, according to Florida Department of Corrections records.