Far North police have been contacted by at least 35 people, many of them overseas travellers who have long since returned home, following last week's arrest of Main Street Lodge owner Michael Harris.
Harris is due back in court on Thursday on 39 charges relating to young men staying at his lodge. It is alleged he drugged backpackers, indecently assaulted them and took intimate photos.
Police believe there are at least 16 victims aged between 18 and 26 from various countries including the UK and America, but mostly from Germany. All were thought to be longer-term guests staying in the lodge owner's residence.
A special 0800 number and email address have been set up, leading to a number of calls from possible victims.
Police searched the lodge after a complaint by a male tourist early last week. It is believed that images found on a computer led to the other charges.