There was a murder. The detective suspected the artist first... because he was sketchy.
The Sketchy Artist
Explanation
Explain Bear
Listen here, you unfunny human. You thought that a 'sketchy' artist was the culprit because he was... literally sketchy. Like, he makes sketches. The joke plays on the double meaning of 'sketchy' - being suspicious and also drawing sketches. A real knee-slapper, isn't it?
gayboy123
oh i get it