BAKERSFIELD, Calif. — A California State Prison inmate, Juan Vallejo Corona—whose victims were all farm workers—died of natural causes on Monday, March 4 at 8:15 a.m. at an outside hospital, according to the California Department of Corrections and Rehabilitation.

Corona, 85, was serving 25 concurrent life sentences for 25 counts of first-degree murder. His victims were all farm workers.

According to the CDCR, in 1971, 25 bodies were found buried in orchards. All the victims were men who had been seen with Corona or had been hired through Corona’s Sutter County labor contracting business. The number of murders set a record in the United States at the time.