It's possible that Dean Martin might have taken the title role in Mr. Ricco because every player likes doing a courtroom drama and Mr. Ricco is a high priced San Francisco defense attorney. But other than the very beginning when Judge Harry Wingreen dismisses with prejudice the charge of murder against Dino's client Thalmus Rasulala we don't see a courtroom again.
Right after that a rash of killings start breaking out and there is an attempt in fact a couple of attempts on Martin's life. Eyewitnesses identify the sniper with a rifle as Martin's own client. That doesn't make sense to Martin, why would the man he just got off be trying to kill him? But somebody is certainly using him for target practice.
Dino looks pretty bored with the whole business, he's got an air of disinterestedness throughout the film. According to Nick Tosches's fine biography of Dean Martin, his co-star Thalmus Rasulala said he never was able to connect with him on any level during the production of Mr. Ricco. At the time Martin was going through a lot financial and romantic entanglements and the film was clearly one he did for the money.
Geraldine Brooks plays a woman who Dean's friends try to fix up with and Cindy Williams plays a girl Friday assistant. Mr. Ricco has the look and feel of a television pilot and Dino had shown some spark might have been picked up as a series.
As it is he saunters through the film like it was his nightclub act in Vegas.
