Boxer Julio César Chávez Jr. has been deported to Mexico, where he’s wanted for alleged cartel ties, following his arrest in the U.S. for overstaying his visa and lying on a green card application.

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.

“I’ve spoken to my son, and he’s in shock,” said Julio Chávez Sr., the boxing icon, during an interview with the Mexican newspaper El Heraldo last month.