Authorities in Louisiana say a local civil-rights leader is dead at the age of 75, adding that Sadie Roberts-Joseph’s remains were found this week in the trunk of a parked vehicle.

According to Fox News, the gruesome discovery came on Friday evening at a location on North 20th Street in Baton Rouge, just a few miles from her residence.

Roberts-Joseph had long advocated for civil rights and was known in her community for establishing the Baton Rouge African American Museum nearly 20 years ago.

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Police, politicians and members of the public joined her loved ones in mourning while remembering her impact to the city.

“Ms. Sadie was a tireless advocate of peace in the community,” police wrote in a Facebook post. “We had opportunities to work with her on so many levels. … Ms. Sadie is a treasure to our community, she will be missed by BRPD and her loss will be felt in the community she served.”

C. Denise Marcelle, a state representative, posted on Facebook that she had heard the woman “was found murdered,” as reported by The Advocate.

“This woman was amazing and loved her history,” Marcelle added. “She never bothered anyone.”

As of the most recent updates available, officials had not released details surrounding her cause of death or how her body was found.

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[Featured image: Baton Rouge Police Department]