Tome-san

Tome is a CSI member of the Tokyo Metropolitan Police, and is often seen investigating the crime scene during cases where Megure is the head inspector. Tome is an anime only character and, unlike Takagi, Shiratori, and Chiba, has never appeared in the manga. He only made sporadic and scattered appearances in the show, but then his role has increased heavily, appearing more frequently.
Tome seems to be very serious and passionate with his work. He, like many other policemen, listen to what Conan has to say, although Conan sometimes says something like: "Mouri wants you to check up on this", or "Mouri asks if this was found". This is to asks him about forensic evidence he has collected, and Tome is often happy to answer.

(Source: Detective Conan Wiki)