The article does not say a lot about DNA, but there was this:
Investigators also found the murder weapon wrapped in a bandana with Jones’ DNA in an attic space above his bedroom. Jones claims the murder weapon was placed there by the actual killer, who visited Jones’ house after Howell was shot.
So, how did the "real murderer" get it in the attic? Did he convince Jones to let him hide a murder weapon in his attic?
“The Other Guy Did IT defense”