Dental Casts of Dr. George Parkman, 1846
This plaster inferior jaw cast and wax mold were part of the forensic evidence used during the murder trial of Dr. John White Webster in 1850. Dr. George Parkman, a noted Boston physician and Harvard benefactor, disappeared on November 23, 1849, and a subsequent search of the premises of Harvard Medical School revealed parts of a human body -- including artificial teeth -- in the laboratory of Dr. Webster, Harvard's Erving Professor of Chemistry.

Dr. Nathan Cooley Keep, who had fitted Parkman with dentures several years earlier, was called as a trial witness and stated, "The teeth were brought to me, and I at once recognized them as the teeth which I had made for Dr. Parkman and with which I had taken so much pains... There could be no mistake about them."

John White Webster was convicted of the murder and executed on August 30, 1850.