Joseph Vargas, 21, was found shot in the head Nov. 23 on Quincy Street. Lisa Marie Ramos, 33, is wanted for questioning, the sheriff's office said Thursday.
Ramos is also wanted on a misdemeanor warrant.
Anyone who sees Ramos or knows of her whereabouts is asked to call Detective Andrew Avila at (661) 391-7612. Anonymous text tips can be sent to TIP411 (847411), with the keyword "KCSO" prior to the message.