What's the name of this soundtrack of DC?

[Conan no helper]

This is one of those very old but gold Detective Conan soundtrack. It seems that there's no soundtrack named Shizumuta yo, anyone know what's the name of this soundtrack?

Personally, I really like this soundtrack, I wish the developers can return such of tone(Original DC style of tone) back to modern DC anime.

[Monsi]

It's Shizumu Yuuhi.

[Rye]

I love this tune!!! During the part after the crime occurs and Conan is looking for details!!! I enjoy this. It gives off a nostalgic feeling.

[Wicky]

I love it too, it's so inquisitive