From The Perry Mason TV Show Book (Revised)
This case involves nothing less than:

(a) a stolen gorilla named Toto
(b) a shady zoo dentist
(c) a lion charged with murder
(d) a zoo curator charged with murder
(e) [spoiler]*
(f) [spoiler]*

Perry has to defend d when b is murdered. No wonder his rates are so high.
*Items (e) & (f) suppressed as spoilers. To view, use link above.