OAKLEY — A man who killed a teen and wounded three others in a house party here has been sentenced to 30 years in prison, records show.

Originally charged with murder, Sean Karp, 20, instead accepted convictions on charges of voluntary manslaughter and assault with a firearm, court records show. In exchange, he was sentenced to 30 years on Aug. 12, and sent to North Kern State Prison six days later.

The sentence resulted from a plea agreement between Karp and Contra Costa prosecutors. Karp was 18 at the time of the shooting.

The charges stem from a shooting that happened Oct. 21, 2023 during a house party on the 400 block of Shannon Way in Oakley. Ke’Marion Tucker, 16, of Brentwood, was killed. Three other teens were injured, two boys aged 17 and 15 at the time, and a then-17-year-old g

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