Who is Dr. Starr from The Monstrumologist and what is their importance?

Dr. Starr is the psychiatrist responsible for the patients at Motley Hill Sanatorium, where Hezekiah Varner is committed. Dr. Starr is an old man, but he is also a very corrupt individual. At first, it seems Starr is merely corruptible, accepting bribes for information, and caring little about the patients in his care.