Joaquín has been convicted for bombing a prison guard training facility in San Bernardo, Chile, along with his comrade Kevin Garrido. They both were arrested the day of the bombing, November 19, 2015, and were held in prison until September 2018, when the court sentenced Kevin to 17 years, and Joaquín to 13. On November 2nd, 2018, Kevin was murdered in prison by another prisoner. In 2016, while awaiting sentence, Joaquín attacked the former boss the intelligence police during the Pinochet dictatorship inside the prison they both were held in.