A Mexican court has heard the man charged with murdering 2 Aussie brothers and their friend – boasted to his then partner that he had killed “3 gringos”. Ari Gisell says Jesús Gerardo, also known as “El Kekas”, arrived at her house to show her the new tyres he had put on her car – allegedly stolen from the surfers’ van. Gisell was originally charged in connection with the deaths but has now turned as a star witness against her former boyfriend. Jake and Callum Robinson, as well as American Carter Rhoad, were surfing and camping in a remote part of northern Mexico when they were shot dead. Prosecutors have also told the court they believe others were involved in the killings. Dozens of people held a protest last week in Ensenada calling on authorities to do more to tackle violence facing tourists and locals.