Columbo (1971)

S5E4 A Matter of Honor

The proprietor of a bull ranch in Mexico grants his employees a day of rest and convinces his top hand to confront the bull that almost took his son's life. However, he instead uses a tranquilizer to subdue the animal, allowing it to fatally injure him. Meanwhile, Columbo is on holiday in Mexico when a fellow officer pulls him into the investigation. He struggles to persuade local authorities that the incident was not an accident but rather murder. The challenge lies in proving that the bull itself serves as a deadly weapon.