Prosecutors say Willis, president of Duced Out Records, ordered his brother, James Willis, to shoot Carter after a confrontation outside an Overland Park bar.
James Willis is awaiting trial on a murder charge.
The Kansas City Star reports Carter, who went by Yunglyfe Carter or Bo Boogy, was driving away when James Willis allegedly fired several shots at his car, hitting Carter four times in the chest.
Attorneys for Dale Willis argued no evidence confirmed that Dale Willis ordered the shooting.