Witness for the Prosecution by Agatha Christie

This collection of short stories contains more suspense/supernatural thrillers than out and out mysteries. Often, they are not the type of puzzles that require police aid or police intervention. Also, Hercule Poirot only appears in one of the mysteries. Still, I thought some of these stories were quite good, especially the title story, "Witness for the Prosecution," and "The Blue Jar."