Sango Yokomizo was originally the head inspector of the Saitama district, though he transferred to the Shizuoka district soon after. However, he and his twin brother [Jugo,](https://anilist.co/character/30363/Juugo-Yokomizo) who is also a police inspector and has remained in Saitama, stay in touch and have even assisted each other in various _(and even locally unrelated)_ cases.
[Conan](https://anilist.co/character/1742/Conan-Edogawa) often runs into Yokomizo when he is away for a festival, or on a vacation. It is hinted that Sango is the head inspector of a richer town, as he often is involved in a case at a fancy hotel, or one of [Sonoko Suzuki's](https://anilist.co/character/1749/Sonoko-Suzuki) vacation spots, as well as the homes of her relatives. He is also the head inspector in most cases involving a famous actor or actress, and at many festivals.
Yokomizo is a capable police officer, though with one odious personal habit: he tends to get his face right into a suspect's face, study them closely, and scream into their face when he believes he is onto something, a habit which even he believes is a little embarrassing. Another trait of his is to speak really loudly when deeply involved in an investigation. His loud voice has received many complaints from suspects.
(Source: Detective Conan World)