Arthur Lee Burney, 53, was found dead in the horse barn at his Coweta, Oklahoma, home on his sixteenth wedding anniversary, February 18, 2011. His wife Patricia initially told authorities he had suffered a heart attack and hit his head, but an autopsy showed Arthur had been shot in the brow with a small-caliber rifle, a wound that had been obscured at the scene.

Investigators say Patricia had been having an affair, was facing financial problems, and had previously tried with her 14-year-old daughter Michelle to poison Arthur. Authorities allege Patricia and Michelle enlisted Michelle’s 19-year-old boyfriend, Michael Richardson, promised him $6,000, and supplied a .22-caliber rifle. Richardson allegedly waited in the barn’s tack room and shot Arthur as he entered. Michelle reportedly told a friend about the killing, and that friend contacted law enforcement; the murder weapon was recovered on the property.

Patricia Burney, Michelle Burney, and Michael Richardson were arrested and charged with first-degree murder. Patricia was convicted and sentenced to life without parole; Richardson pleaded guilty to second-degree murder and received 28 years; Michelle, as a juvenile, was sent to a detention facility. Does anyone have information about Arthur’s routines around the barn or about the people involved?