A convicted murderer who escaped custody from correction officers in California in December is now accused of killing a Mexican police commander.

Cesar Hernandez, 34, who was serving a life sentence for murder, escaped from the custody of the California Department of Corrections and Rehabilitation on Dec. 2, according to a flyer released by the U.S. Embassy in Mexico and the U.S. Marshals Service on Friday.

The flyer said Hernandez killed a Mexican State Citizen Security Forces agent on…