Santa Maria, CA -- The man accused of gunning down his estranged wife in Santa Maria last month is back in town to face murder charges. Isaac Martinez was extradited from Yuma, Arizona to the Santa Barbara County jail. He is scheduled to make his first court appearance on Friday in Santa Maria. Martinez is accused of shooting his estranged wife, Maria Dejesus Martinez, several times on August 5. She died at a Santa Maria hospital that day. Martinez was arrested a day later in Arizona.