[3] Before running for office, he had served as the marketing manager of the Yaquis de Obregón baseball team in his hometown and was working at his privately owned publicity agency.

[10] Prior to running for office, Castro Luque owned a publicity agency and was the marketing manager of the Yaquis de Obregón baseball team in his hometown.

[10] Unaware of the assailant, the deputy-elect got out of his car and made a few steps towards the house entrance when an unknown gunman shot at him nine times, hitting vital organs.

[12][13] Nonetheless, according to the investigation of the Office of the Attorney General of Sonora (PJGE), the gunman faked a malfunction in his motorcycle when Castro Luque was coming back from a meeting held in Hermosillo prior to his installation as a state deputy.

[17] The Municipal Police of Cajeme, Sonora, reported that Castro Luque's front house door had been forced open and that some people had stolen his laptop a day before the assassination.

[18] At the scene, the police found six .45 millimeter bullet casings, as well as six warheads from the same caliber, that will help the office of the Sonora attorney general (PGJE) as evidence for the investigation.

[14][19] At 3:00 p.m. during a religious ceremony in the Cathedral of Ciudad Obregón, friends, supporters, politicians, and several citizens of the municipality gathered to pay homage to Castro Luque.

[22] On 24 September 2012, the PGJE indicated that Manuel Ernesto Fernández Félix, the alternate deputy for Ciudad Obregón, ordered the assassination of Castro Luque so he could go into office.