Aifán works with a very small staff of three and only one of those is permanent.[2] In about 2016, she became a "high risk D" judge. During her time as a judge over 75 complaints were filed against her.[2]
She dealt with nine businesspeople who were involved with giving bribes to disgraced minister Alejandro Sinibaldi Aparicio [es]. She ordered that they pay compensation and that they gave public apologies.[2]
She was one of three judges, together with Gloria Patricia Porras [es] and Yassmín Barrios Aguilar, who have received support from the Inter-American Court of Human Rights. That court has ordered that these three should be given special protection.[3] While she was dealing with the case against the politician Gustavo Alejos she received reports that two of her staff had been tampering with evidence.
She backed her staff and when the case went to the Supreme court then her staff were not punished but promoted. Aifán has won disputes like this but she has had to hire lawyers at her own expense to counter the dubious charges.[4]
On March 21, 2022 Aifán resigned her position and fled the country for fear that corrupt government officials were about to have her arrested.[5]
Unusually another seven women were included in the awards who had died in Afghanistan.[3] Aifán's citation noted particularly her attacks on corruption, improving both transparency and the independence of the Guatemalan justice system.[6]