The Chihuahua prosecutor's office said that the authorities' response was delayed due to a communication issue that prevented the effective exchange of information. The Secretary of Citizen Security, Alfonzo Durazo, said the attack was the result of confusion between criminal groups seeking to control the region. The Sonora authorities confirmed that a person possibly linked to the Mormon family massacre was arrested in the Sierra de Agua Prieta in Sonora. The Criminal Investigation Ministerial Agency said the detainee had several assault rifles and high caliber weapons. The Foreign Minister of Mexico, Marcelo Ebrard, toured the area where the events took place to gather more details and will meet with local authorities to verify the progress of the investigation. Ebrard said the president, Andrés Manuel López Obrador called the president of the United States. UU. Donald Trump, to show him that he will act as the law establishes. Children injured in the attack were admitted to a hospital in Mexico, but were then transferred to a hospital in Tucson, Arizona. The families of the victims are convinced that it was a premeditated act. Kendra Lee Miller, sister-in-law of Rhonita Maria Miller, one of those killed, said in an interview with CNN that the incident was "a purposeful attack against innocent civilians." 13-year-old Devin Blake hid six of his brothers to save them and then walked 20 kilometers for six hours to La Mora to seek help.