Joseph Jimenez was an advocates of peasant rights and a member of the Kilusang Magbubukid ng Pilipinas (KMP). On November 30, 2022, Ericson was captured by elements of the 94th and 47th Infantry Battalion of the Philippine Army and then killed, alongside human rights activist Ericson Acosta. At the time of the attack, the defenders were unarmed and were conducting research in Kabankalan City, Negros Occidental, consulting farmers on their living and working conditions. The area is affected by century-long conflicts and local farmers are facing displacement and other issues affecting their livelihoods due to land seizures by hacienda owners (large farm enterprises).