Olvera, a freelance photographer and former correspondent for the Morelia-based daily La Voz de Michoacán, was shot outside his home in La Piedad in the central state of Michoacán.
Olvera left his home around 8 p.m. with his 5-year-old son. While they were waiting at a bus stop, an unknown assailant approached Olvera and fired at close range, according to local press reports. A bullet struck Olvera in the neck, and he died at the scene. His son was unharmed.
Olvera worked for La Voz de Michoacán until April 2002 when he resigned to become a salesman for a processed meat company, the paper reported. But Olvera continued working as a freelancer, providing photographs and crime tips to local media, the Mexico City-based El Universal said.