Martell "Kardone" Derouen, a San Antonio rapper who is known to be Beyonce's cousin, has been shot to death at age 34.
Police discovered Kardone's bullet-ridden body after a friend who hadn't heard from him in few days called for a welfare check.
Sasha Skare, who had produced music for Kardone, has been identified as the suspect in the murder and police are looking for her.
"There is no way to replace him but please help us find this girl," Kardone's wife Joia said. "She is dangerous and I do believe she will kill again. If you see her please contact the police."
Kardone had been signed to Sony imprint The Orchard.
No comment from Beyonce on the murder.