7 February 1999: PRI candidate René Juarez Cisneros wins the gubernatorial election.
22 February 1999: 25,000 people march in Acapulco claiming that there had been electoral fraud in the elections for governor and asking for an elections committee to review the results.
14 April 1999: rural and social organizations, the state leadership of the PRD and the State Commission on Human Rights (CODDEHUM) protest to re-open the case of the Aguas Blancas massacre.
20-21 April 1999: soldiers kill two indigenous Mixtecos (one of whom was a child), rape two Mixteca women in the neighborhood of Nuevo San José, and kill another member of a neighboring indigenous community, in the municipality of Tlacoachistlahuaca, Costa Chica.
2 May 1999: soldiers illegally arrest, torture and transfer to military installations the campesino-ecologists Rodolfo Montiel Flores and Teodoro Cabrera García from the Organization of Rural Ecologists from the Sierra of Petatlán and Coyuca de Catalán (OCESP), whose cases are then processed with fabricated proofs. Another farmer, Salomé Sánchez Ortiz, is executed. One year later, the CNDH issues Recommendation 8/2000 in which it indicates that the Army violated the human rights of the ecologists by torturing them, placing weapons and narcotics on them, and maintaining them illegally under Army control for at least two and a half days.
3 May 1999: the Indigenous Organization of Mixteco and Tlapaneco Peoples (OIPMT) from Ayutla (Costa Chica) denounces the state health system and accuse it of forced sterilization of indigenous men and women through deception (promises and threats to take away economic aid if they did not agree to undergo the operation).
23 September 1999: the ERPI attacks a military convoy close to Ayutla, wounding three soldiers.