Ring of Death | Un Detective | Detective Belli (1969)
"A crooked detective begins investigating a situation on behalf of a friend and gets involved in murder, deception and double-cross." ... https://www.youtube.com/watch?v=vqv556kbPR4
"A gang raid a bank, making off with a nice tidy sum and head off to a hideout in the mountains to take refuge, with a few women in tow to keep them company. Soon these robbers start being killed by an unknown black-gloved figure."
...
https://www.youtube.com/watch?v=Jl4F7N_TTtw
"After leaving her husband, Ellen Foster encounters a mysterious journalist in New Orleans and they quickly begin a passionate affair. Amidst Mardi Gras celebrations, the relationship begins to unravel when Ellen realizes that things aren't what they seem and learns that her life is in danger."
...
https://www.youtube.com/watch?v=rjwyEgizbHQ
"Having recently escaped the clutches of a hippie sex cult, a beautiful model is pursued by a serial killer whose previous victims include former occupants of her new apartment."
...
https://www.youtube.com/watch?v=X0U_mnI-Bs4
"A woman searches for her missing lover, a psychiatrist who has suddenly vanished for no apparent reason. She ends up at a villa populated by a group of eccentric individuals. A string of murders commence immediately."
...
https://www.youtube.com/watch?v=QPmBie9UZOg
"A beautiful but poor young girl finds all the money and material goods she never had when she becomes the girlfriend of a crime boss, but soon learns that there is a price to be paid for that kind of life."
...
https://www.youtube.com/watch?v=pboyrXlRZMQ
"A journalist attempting to solve a mystery in "Martial World" enlists the aid of a master fighter and a woman named Green Breeze. They go to a mysterious castle where they come across poisonous butterflies and a black-leather-clad killer."
...
https://www.youtube.com/watch?v=8o9dyLJzbYA
"An invalid billionaire sends out letters to his estranged daughters. He summons them to his mansion in order to test them, determined to find his worthy heir. The girls travel to their father and soon after they arrive, a series of successive deaths occur, complicating their hopes of an easy inheritance."
...
https://www.youtube.com/watch?v=nULaEYMTMyk
"A corpse is found in the trunk of a car that belongs to the Swiss ambassador to the UK. Speculations run wild, as more people around the ambassador keep falling victim to the vicious killer. A former detective is hired to investigate."
...
https://www.youtube.com/watch?v=Wdw4XSZ68Is