Look at some of the old time radio shows that were mystery or detective, they are long out of copyright, the same with many of the old detective movies that you can get on DVD for $1.
Nope. Copyright lasts for between 50-100 years from the artist's death, depending on the country. And even then its a grey area.You can't base your derivative work on a more modern arrangement as the creator of the derivative work still holds Copyright - it has to be based on the original work.
Copyright is a minefield.