This film was intended for TV, but released theatrically, and it's important to remember that. It's an OK detective thriller about a policeman (David Janssen) on a stakeout who shoots someone he thinks is a stalker in self defense, only to discover that the suspect was a respected doctor and that the gun he allegedly pulled can't be found. Accused of shooting unjustly, he conducts his own investigation to clear his name. The film is well-acted and sometimes interesting, but many scenes are not believable. If this had happened in real life, Jannsen's character would have never been given access to the people he questions, especially the victim's widow and loyal nurse, let alone obtained cooperation from them. Still, the story moves briskly enough and gives a view of Los Angeles at the time, which was going through a cultural transition to a greater degree than the rest of the country. If the plot and cast really interest you, give it a look and you'll be entertained enough.
Review of Warning Shot
