Calloway’s wife, Dana Lemar (25) of Houma pleaded guilty to manslaughter and received a 25-year prison sentence on April 16, 2018 in exchange for her cooperation and testimony in Calloway's trial.
Robert had met Lemar at Boomtown Casino after exchanging messages on Facebook. The two rode around and then, following a plan that Calloway conceived, she told Robert she had to return to Boomtown because her aunt’s vehicle had broken down. After arriving at the supposedly broken down vehicle and while Robert was checking under the hood of the car, Calloway shot Robert and left his body in a drainage ditch. The two then went to a sugarcane field east of Thibodaux where Calloway removed the tires and rims from Robert’s vehicle, doused the interior with gas and set it on fire.
The multi-agency investigation consisted of the Lafourche Parish Sheriff's Office, the Slidell Police Department, the Jefferson Parish Sheriff's Office, and the Houma Police Department and culminated in the arrest of Calloway and Lemar on June 29, 2016, the same day Robert's decomposing body was discovered by a passer-by.