Highly recommended for this mod to work properly: Sangres Shirt Picker by Kuziz (Floral Blue Shirt option)
This mod replaces Sangres's default blue shirt with the default business outfit, also removes his moustache. Template for Sangres's textures will be released shortly.
Installation:
Put the "Sangres Casual Business Shirt" in your Mod_Override folder which is located in here, if not then simply create one.
P.S, If you want his moustache back then please remove the following file "npc_criminal_max_hair_df" which is located in:
units > pd2_dlc_max > characters > npc_criminals_max and remove it.