The Skull Murder Mystery (1932).

In the Skull Murder Mystery, criminologist Dr. Crabtree (Donald Meek) and Inspector Carr (John Hamilton) need to deduce who has been murdered when a box of bones is discovered.

This is part of the series of short films produced from source material written by S. S. Van Dine and featuring Crabtree and Carr; see the previous blog posts on The Wall Street Mystery and The Trans-Atlantic Mystery.