(CNN) A Louisiana African American history museum has been vandalized a month after its beloved founder was killed.

Benches were smashed, gardens trampled, a fountain destroyed and other artifacts damaged at the Odell S. Williams Now and Then African American Museum in Baton Rouge.

Sadie Roberts-Joseph, the founder of the museum, was killed last month, and her body was discovered in the trunk of her car. A tenant in one her rental homes has been charged with first-degree murder.

Police are checking for possible surveillance video of the vandalism.

Baton Rouge police spokesman Sgt. L'Jean McKneely said that the vandalism was reported Monday and that police believe it happened over the weekend. He said detectives would check with a nearby state office and other buildings in the area to see whether there is any surveillance video showing what happened.

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