What does "さ" means in 探偵さ?


I watch an animation called Detective Conan, which is about a detective. I
read translations, but try to listen in Japanese. Sometimes, when he is asked
"who are you?", the main character answers by saying "探偵さ" (or is it "探偵さあ"?).

In this case, what does さ means?

Thank you for your explanations.




This さ is similar to だ in meaning, but it is less assertive. Unlike だ, it
attaches not only to nouns and the stem of na-adjectives but also to the
dictionary form of verbs and i-adjectives.




This さ is similar to だ in meaning, but it is less assertive. Unlike だ, it
attaches not only to nouns and the stem of na-adjectives but also to the
dictionary form of verbs and i-adjectives.

