Police in New Zealand said a hostel owner drugged and assaulted dozens of backpackers—some of whom may have no idea it ever happened.

Michael Harris, 56, was charged with assaulting 16 male tourists who stayed at his Mainstreet Lodge in Kaitaia over the last two-and-a-half years. Police say he made "intimate visual recordings" with the men, who were mostly overseas tourists between the ages of 18 and 25.

"These victims are unlikely to know that something has happened to them, although they may have suspicions," Detective Senior Sergeant Rhys Johnson told reporters Wednesday.

Authorities are still investigating to see if there were additional victims.

It's not clear how police originally discovered his real-life horror movie factory, but Harris is now facing an array of charges, including aggravated wounding, making of intimate visual recordings, possession of intimate visual recordings and indecent assault.

[image via Facebook]