The Killer with a Thousand Eyes
Los mil ojos del asesino (original)
A special detective is sent to Lisbon in order to investigate a series of murders. After looking into the murders, our hero realises that they are somehow linked to an illegal drug smuggling operation and so sets about looking into that in order to solve the murders and stop the smuggling from taking place.
Starring Anthony Steffen, Antonio Pica, María Kosty, Raf Baldassarre, Romy, Julián Ugarte, Eduardo Fajardo, Carmen Yazalde, Luis Gaspar, Julio Pérez Tabernero
Watch "The Killer with a Thousand Eyes" on Amazon released in 1974. It's a crime and thriller movie, and has a rating of 5.6 out of 10 from Imdb which is fairly okay for this kind of movie, and is currently only available for purchase or rent.