Last Salute to the Commodore

S5, E6: Commodore Otis Swanson, an expert yachtsman, is presumed drowned in a boating accident. But Lt. Columbo tenaciously investigates the case, suspecting homicide. When Columbo finds key clues that point to Swanson’s money hungry son-in-law, Charles Clay, as the prime suspect, Clay himself becomes a victim of homicide.