[1] Unlike other political assassinations in Mexico, Serrano Cedillo's death did not bear the signs of organized crime, and was a result of "a series of deep" marital problems.

[3] Prior to his election to the state Congress, Serrano Cedillo was the president of the Institutional Revolutionary Party (PRI) in the municipality of Nezahualcóyotl and a former mayoral candidate for the same locality.

[4][11] The Mexican authorities indicated on 20 September 2012 that Serrano Cedillo's wife, Patricia Grimaldo de la Cruz, reportedly assassinated her husband after having a dispute that same morning for "profound series of conjugal differences.

[12] He was the second PRI politician killed in just two days; Eduardo Castro Luque, a deputy-elect of the state of Sonora, was shot dead by unknown assailants on 14 September 2012.

[10] After the Municipal Committee of the PRI paid tribute to the fallen Serrano Cedillo on 17 September 2012, he was buried in Jardines de Oriente cemetery.