Three suspects are facing charges for a mass shooting at a nightclub in January.
Baton Rouge police arrested 20-year-old Shawnchez Lemar on Wednesday.
Already in custody were two 19-year-old suspects, Nikeal Franklin and Jy'Shaun Jackson.
Police say a dozen people were wounded in the shooting at the Dior Bar and Lounge.
Franklin faces 12 counts of attempted first-degree murder, while Jackson and Lemar both face 12 counts of principal to attempted first-degree murder.
Police are looking for a fourth suspect.
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