Mexican boxer Julio Cesar Chavez Jr has entered a prison in the northern Mexico state of Sonora after his arrest in the United States in July, Mexico's national arrest registry showed on Tuesday.

Mexican boxer Julio Cesar Chavez Jr. has entered a prison in the northern Mexico state of Sonora after his arrest in the United States in July, the Mexican arrest registry showed on Tuesday.

“It’s complicated; there’s a lot of talk, but we’re calm because we know my son’s innocence,” Chávez Sr. told Colombian newspaper El Heraldo.