A detective who uses his deductive powers to corner a suspect and then does nothing to stop them from committing suicide is no better than a murderer himself. - Kudo Shinichi

Detectives are only human; we're not Gods that know everything. When detectives tell their theory, in reality, most are rather anxious. Thinking that there's always possibility that they could have missed something, somewhere... But in return, the excitement you experience when your theory's smack bang correct is twice as great!

A detective who uses his deductive powers to corner a suspect and then does nothing to stop them from committing suicide is no better than a murderer himself. - Kudo Shinichi

Don't judge from the outside. Like any beautiful rose has thorns... the more a person appears nice on the outside, the more you should doubt the inside.

to keep believing in life, until you're sure of death, it's the way a detective should be." - Kogoro Mouri, Detective Conan

No matter how well you think you've hidden, you'll always leave behind a trace. And the more you try to hide that trace, the more obvious and troublesome it will become.

Humans are suspicious and jealous creatures. When they see something perfect, they want to find a flaw.